This has already been talked about before, and nothing needs to be balanced. Some races are easier to play than others, but there is always a counter for another race. Sure the vagas are pretty powerful, and so is molecule, but they can all be effectively countered by another race or someone who is just good at the game. "Balance" would make the game to vanilla and uninteresting. Moreover, "balancing" a slew of races with different and unique abilities is not possible in the way you describe since there would be far too many variables to account for. I've seen plenty of the better players use some of the so called weaker races and do damn well.