Introduction of Page Controllers into Drupal

There is a special page that describes what Page Controller is and how it can be used: http://drupal.org/node/1389042

I would like to suggest introduce the Page Controllers for all core modules.

Each controller class could use a namespace. For example if module name is "foo_bar" and the page controller name is "MyController", the namespace would be "FooBar" and the class name would be MyController, so the full class name would be \FooBar\MyController.

Moreover I would like to consider to use following structure for module directories:
- module_name/forms/ - all forms. For example for the form callback module_name_my_form_id(), the file name can be 'my_form_id.inc'.
- module_name/nodeapi/ - node API.
- module_name/libs/ - some useful libraries/classes.
- module_name/controllers/ - page controllers. Each controller can handle set of paths. Each controller is class that should end with the "Controller" suffix, for example MyController. The controller classes can use the namespace.
- module_name/ui/ - user interface including (theme_*() functions, and the *.tpl.php files).
- module_name/models/ - models (optional)
- module_name/tests/ - tests.
- module_name/utils/ - some utility classes.
- module_name/services/ - services. Each service can be called from the Page Controller or other service class. Each service is class that should end with the "Service" suffix, for example MyService. The service classes can use the namespaces.
- module_name/repos/ - repositories (Repository pattern, optional).

I hope I wrote in the right place to suggest and introduce these concepts ;)