I like the commander idea, but how about it progresses you rather then you choosing, so if you spam tanks, then you start to specialise in tanks. If you spam aircraft, then it specialises you in that. I think aim it at multiplayer, and then allow opponents to see who they're up against. It adds more strategy, and it also makes people play a lot more if they want to specialise, as they have to play a set way for a while before the specialisation kicks in. This screws me though, as i never play online!!