I know that we are quite a ways away from worrying about differnt types of game modes besides default but I had an idea that I thought could potentially be fun:
What if each team started out with a set amount of TRes, the team's commander could use the Tres to go down essentially one tech tree and once the Tres was gone the winner would depend on which team made the correct "counter" choice as far as what upgrades they bought. Sort of like a big game or Rock, Paper, Scissors. You can't earn more Tres, you make a decision and hope you can counter the enemy team. I picture the trees sort of like the skill trees in wow (at least when I played it years ago) where you have three choices, you can go to the end of one tree for the ultimate skills, or you can balance your build and make a hybrid.
Each individual could also get a set amount of Pres to spend on themselves while the commander gets the upgrades depending on what tree was chosen. Maybe they would have a set Pres that can not be added too, maybe they can have a set amount that grows a little with kills, I don't know which would be balanced.
To avoid stale mates and turtling, either make the upgrades slightly exaggerated so that a team that was "saving" their res would quickly become out matched, or maybe add some sort of mechanism (a timer?) that forces a tree to be chosen soon after or before the game actually "begins".
These could be short games that force an outcome, each tree having advantages and disadvantages, meaning skill comes into play on a personal level and on a team level. Another potential issue would be: what if your commander chooses a path that no one else wants? Well I suppose you would have to just put your faith in the commander as you do in a normal game and kick him/her if neccessary.
What do you all think, could be fun?