In AOE2 (one of the best/most simple RTS I still play) you have the option to play on the same color. So one could pay attention to the army, the other one to village/economy development. Oh yes if you didn't communicate well it was hilarious. But it just looked like 2 mouses were manipulating the same color.
so if it's possible I would implement it. (just to hear the conversations of 2 players argueing whether resources should go to army or village development)
