Mic control would be absolutely awesome...if it were only part of the revolution, like the DS, as Ian mentioned.
I believe it was Ares who spoke of some extremely awesome war game for Rev. I'm not saying I necessarily believe him, but his game idea was a cool one anyway. It seriously gave me goosebumps reading his description of the game. It's not a new idea, but I seriously think it would be awesome to be in the middle of combat and deciding on the fly what your people are to do. If anything's close to "real-time" strategy, it would be this.