In the MVC, the Controller has no references to the View.
In the MVP the Presenter has a reference to the view and can change it.
In PureMVC the mediator is acting like a Presenter. And the controller remains with no direct access to the view.

I have been playing arround with the MVC but i dont see any diference between using Mediators-Proxys-etc... over coding a simple MVC structure by my own... using Views, controllers and models...

so why using the framework?