I was thinking about it and, I'd REALLY like to play a single-player strategy campaign where I breed units in between RTS battles. But I'm not sure how the breeding could fit into a multiplayer version (it's like the problem with balancing pokemon duels when players haven't completed the single player game, including maxing the level on their dueling team). As for putting the breeding right into the RTS battle, I can't see how breeding, which is a though-requiring activity, would fit into a session where one is playing as fast as possible.
You could have a set number of breeding combos to toggle on throughout a multiplayer game. Sort of like magic the gathering and the sideboard cards, when you come up against something the units you have cant beat, you can start generating some mixed race from your sideboard.
That way you would not have to come up with a combo on the fly.
Would rts really be better for this than a turn based game?
A game I have been playing lately is xcom, and I could see how coming up with your own mixed up units to play in a squad like turn based game could be fun.
Or it could be played out like savage newearth, its a sort of rts but also a first person shooter.
I think a game like savage is always going to be better than mouser games like starcraft, warcraft, or command and conquer. Because units left alone or even those in combat that you aren't micromanaging are going to make a lot of mistakes.
Cool thing about savage is that each team has a player controlling it like its a rts, but every combatant for each side is directly controlled by separate players.