diff --git a/railties/lib/rails/application.rb b/railties/lib/rails/application.rb
index 9be9584873b..db1f62f381a 100644
--- a/railties/lib/rails/application.rb
+++ b/railties/lib/rails/application.rb
@@ -2,8 +2,6 @@ require 'fileutils'
 
 module Rails
   class Application < Engine
-    include Initializable
-
     class << self
       alias    :configure :class_eval
       delegate :initialize!, :load_tasks, :load_generators, :root, :to => :instance
@@ -122,7 +120,7 @@ module Rails
       app.call(env)
     end
 
-    initializer :add_builtin_route do |app|
+    initializer :add_builtin_route, :before => :build_middleware_stack do |app|
       if Rails.env.development?
         app.route_configuration_files << File.join(RAILTIES_PATH, 'builtin', 'routes.rb')
       end
diff --git a/railties/lib/rails/configuration.rb b/railties/lib/rails/configuration.rb
index 9176809dbd7..01fab1e4749 100644
--- a/railties/lib/rails/configuration.rb
+++ b/railties/lib/rails/configuration.rb
@@ -81,15 +81,13 @@ module Rails
     def paths
       @paths ||= begin
         paths = Rails::Application::Root.new(@root)
-        paths.app                 "app",             :load_path => true
-        paths.app_glob            "app/*",           :load_path => true, :eager_load => true
-        paths.app.controllers     "app/controllers",                     :eager_load => true
-        paths.app.metals          "app/metal"
+        paths.app                 "app",             :eager_load => true, :glob => "*"
+        paths.app.controllers     "app/controllers", :eager_load => true
+        paths.app.metals          "app/metal",       :eager_load => true
         paths.app.views           "app/views"
         paths.lib                 "lib",             :load_path => true
         paths.config              "config"
-        paths.config.environment  "config/environments/#{Rails.env}.rb"
-        paths.config.environments "config/environments", :glob => "#{Rails.env}.rb"
+        paths.config.environment  "config/environments", :glob => "#{Rails.env}.rb"
         paths.config.initializers "config/initializers"
         paths.config.locales      "config/locales"
         paths.config.routes       "config/routes.rb"
@@ -112,10 +110,6 @@ module Rails
     def load_paths
       @load_paths ||= paths.load_paths
     end
-
-    def controller_paths
-      paths.app.controllers.to_a.uniq
-    end
   end
 
   class Configuration < Engine::Configuration
@@ -142,7 +136,7 @@ module Rails
     def paths
       @paths ||= begin
         paths = super
-        paths.app.controllers << builtin_directories
+        paths.app.controllers.concat(builtin_directories)
         paths.config.database    "config/database.yml"
         paths.log                "log/#{Rails.env}.log"
         paths.tmp                "tmp"
@@ -238,6 +232,18 @@ module Rails
       paths.config.log.to_a.first
     end
 
+    def controller_paths=(value)
+      ActiveSupport::Deprecation.warn "config.controller_paths= is deprecated, " <<
+        "please do config.paths.app.controllers= instead", caller
+      paths.app.controllers = value
+    end
+
+    def controller_paths
+      ActiveSupport::Deprecation.warn "config.controller_paths is deprecated, " <<
+        "please do config.paths.app.controllers instead", caller
+      paths.app.controllers.to_a.uniq
+    end
+
     def cache_store
       @cache_store ||= begin
         if File.exist?("#{root}/tmp/cache/")
diff --git a/railties/lib/rails/engine.rb b/railties/lib/rails/engine.rb
index a0139f99838..effbfee6c13 100644
--- a/railties/lib/rails/engine.rb
+++ b/railties/lib/rails/engine.rb
@@ -50,7 +50,9 @@ module Rails
 
     # Add configured load paths to ruby load paths and remove duplicates.
     initializer :set_load_path, :before => :container do
-      config.paths.add_to_load_path
+      expand_load_path(config.load_paths).reverse_each do |path|
+        $LOAD_PATH.unshift(path) if File.directory?(path)
+      end
       $LOAD_PATH.uniq!
     end
 
diff --git a/railties/lib/rails/paths.rb b/railties/lib/rails/paths.rb
index b3d105d8c76..d81af3c7092 100644
--- a/railties/lib/rails/paths.rb
+++ b/railties/lib/rails/paths.rb
@@ -39,6 +39,7 @@ module Rails
         all_paths.map { |path| path.paths if path.eager_load? }.compact.flatten.uniq
       end
 
+      # TODO Discover why do we need to call uniq! here
       def all_paths
         @all_paths.uniq!
         @all_paths
@@ -48,12 +49,6 @@ module Rails
         all_paths.map { |path| path.paths if path.load_path? }.compact.flatten.uniq
       end
 
-      def add_to_load_path
-        load_paths.reverse_each do |path|
-          $LOAD_PATH.unshift(path) if File.directory?(path)
-        end
-      end
-
       def push(*)
         raise "Application root can only have one physical path"
       end
@@ -74,7 +69,7 @@ module Rails
         @children = {}
         @root     = root
         @paths    = paths.flatten
-        @glob     = @options[:glob] || "**/*.rb"
+        @glob     = @options.delete(:glob)
 
         @load_once  = @options[:load_once]
         @eager_load = @options[:eager_load]
@@ -128,10 +123,13 @@ module Rails
 
       def paths
         raise "You need to set a path root" unless @root.path
-
-        @paths.map do |path|
-          path.index('/') == 0 ? path : File.expand_path(File.join(@root.path, path))
+        result = @paths.map do |p|
+          path = File.expand_path(p, @root.path)
+          @glob ? Dir[File.join(path, @glob)] : path
         end
+        result.flatten!
+        result.uniq!
+        result
       end
 
       alias to_a paths
diff --git a/railties/test/application/configuration_test.rb b/railties/test/application/configuration_test.rb
index 2c842eb0963..6968e87986d 100644
--- a/railties/test/application/configuration_test.rb
+++ b/railties/test/application/configuration_test.rb
@@ -34,9 +34,9 @@ module ApplicationTests
       add_to_config <<-RUBY
         config.root = '#{new_app}'
       RUBY
-    
+
       use_frameworks []
-    
+
       require "#{app_path}/config/environment"
       assert_equal Pathname.new(new_app), Rails.application.root
     end
diff --git a/railties/test/initializer/path_test.rb b/railties/test/initializer/path_test.rb
index 328dda6d2c8..76eb29bdf46 100644
--- a/railties/test/initializer/path_test.rb
+++ b/railties/test/initializer/path_test.rb
@@ -8,6 +8,7 @@ module InitializerTests
       build_app
       boot_rails
       FileUtils.rm_rf("#{app_path}/config/environments")
+      app_file "config/environments/development.rb", ""
       add_to_config <<-RUBY
         config.root = "#{app_path}"
         config.after_initialize do
@@ -36,11 +37,8 @@ module InitializerTests
     end
 
     test "booting up Rails yields a valid paths object" do
-      assert_path @paths.app, "app"
       assert_path @paths.app.metals, "app", "metal"
-      assert_path @paths.app.models, "app", "models"
-      assert_path @paths.app.helpers, "app", "helpers"
-      assert_path @paths.app.services, "app", "services"
+      assert_path @paths.app.views, "app", "views"
       assert_path @paths.lib, "lib"
       assert_path @paths.vendor, "vendor"
       assert_path @paths.vendor.plugins, "vendor", "plugins"
@@ -48,7 +46,7 @@ module InitializerTests
       assert_path @paths.tmp.cache, "tmp", "cache"
       assert_path @paths.config, "config"
       assert_path @paths.config.locales, "config", "locales"
-      assert_path @paths.config.environments, "config", "environments"
+      assert_path @paths.config.environment, "config", "environments", "development.rb"
 
       assert_equal root("app", "controllers"), @paths.app.controllers.to_a.first
       assert_equal Pathname.new(File.dirname(__FILE__)).join("..", "..", "builtin", "rails_info").expand_path,
@@ -56,27 +54,22 @@ module InitializerTests
     end
 
     test "booting up Rails yields a list of paths that are eager" do
-      assert @paths.app.models.eager_load?
+      assert @paths.app.eager_load?
       assert @paths.app.controllers.eager_load?
-      assert @paths.app.helpers.eager_load?
       assert @paths.app.metals.eager_load?
     end
 
     test "environments has a glob equal to the current environment" do
-      assert_equal "#{Rails.env}.rb", @paths.config.environments.glob
+      assert_equal "#{Rails.env}.rb", @paths.config.environment.glob
     end
 
     test "load path includes each of the paths in config.paths as long as the directories exist" do
-      assert_in_load_path "app"
       assert_in_load_path "app", "controllers"
       assert_in_load_path "app", "models"
       assert_in_load_path "app", "helpers"
       assert_in_load_path "lib"
       assert_in_load_path "vendor"
 
-      assert_not_in_load_path "app", "views"
-      assert_not_in_load_path "app", "metal"
-      assert_not_in_load_path "app", "services"
       assert_not_in_load_path "config"
       assert_not_in_load_path "config", "locales"
       assert_not_in_load_path "config", "environments"
@@ -86,17 +79,17 @@ module InitializerTests
 
     test "controller paths include builtin in development mode" do
       Rails.env.replace "development"
-      assert Rails::Configuration.new.paths.app.controllers.paths.any? { |p| p =~ /builtin/ }
+      assert Rails::Configuration.new("/").paths.app.controllers.paths.any? { |p| p =~ /builtin/ }
     end
 
     test "controller paths does not have builtin_directories in test mode" do
       Rails.env.replace "test"
-      assert !Rails::Configuration.new.paths.app.controllers.paths.any? { |p| p =~ /builtin/ }
+      assert !Rails::Configuration.new("/").paths.app.controllers.paths.any? { |p| p =~ /builtin/ }
     end
 
     test "controller paths does not have builtin_directories in production mode" do
       Rails.env.replace "production"
-      assert !Rails::Configuration.new.paths.app.controllers.paths.any? { |p| p =~ /builtin/ }
+      assert !Rails::Configuration.new("/").paths.app.controllers.paths.any? { |p| p =~ /builtin/ }
     end
 
   end
diff --git a/railties/test/paths_test.rb b/railties/test/paths_test.rb
index d60d6177f63..001282bb0de 100644
--- a/railties/test/paths_test.rb
+++ b/railties/test/paths_test.rb
@@ -193,12 +193,7 @@ class PathsTest < ActiveSupport::TestCase
     assert_equal 2, @root.eager_load.size
   end
 
-  test "a path should have a glob that defaults to **/*.rb" do
-    @root.app = "/app"
-    assert_equal "**/*.rb", @root.app.glob
-  end
-
-  test "it should be possible to override a path's default glob" do
+  test "it should be possible to add a path's default glob" do
     @root.app = "/app"
     @root.app.glob = "*.rb"
     assert_equal "*.rb", @root.app.glob