So WOTC is asking for player input for the 5th edition of D&D.
I know that whatever they come up with will probably be loaded with unnecessary rules that will make combat even more tactical and less abstract and thus more complicated. There will still be way too much focus on character development to the point where it detracts from the playability of the game.
What I would like to see (although it would never happen) is to see them dip back into the past of D&D and design their own "retro" version if you will. I know that there are a lot of retro options out there already, but I would just like to see what they would do with it.