Excuse the repetition, but I would dearly love to see some cooperative gameplay options in the new series. There is huge potential for games involving 3+ players. With two or more players on the same team, but each only aware of the precise locations of their own units and those of their ally that they have postively identified, you would get some much more interesting 'fogs of war'.
If you are unaware whether the 'Tank?' approching from your flank is one of yours or one of theirs, the consequences of your decisions will sudddenly get much more interesting!