-an easier way to set up views which render only particular entities like bounding geometry for lights by f.i. filling a view associated list with entities
-texture coordinates which are always in the range 0..1 for pp-effects, which is not the case atm. I don't see much sense in this design choice. It annoys me.
-making it possible to use a custom vertex shader for pp-effects

The first one would actually be sufficient.

-a list for entities which can contain multiple materials and associated views, for render view dependend materials

I really don't like to handle view-dependend rendering over material events.

And of course DX11.