Believe it or not, I am starting to not want new units (Orbital excepted). I think that balance issues increase with more units and I am getting the feeling that balance may be incredible with specific function units combined with one faction/set of units. I think it could be this games Starcraft/esports killer feature. (yes planet smashing is probably a killer feature too ;-)
SO PUNNY Actually, balance hasnt even started yet; the game's current balance doesnt reflect what it will be in the future. Uber has mentioned this quite a few times: the current balance is only for Alpha/Beta, or until they get teh full roster up.