Importance of balance

Everyone knows how important balance is. you don't want one enemy that's way too OP, or a certain weapon that's so strong, there just isn't any challenge left. But, in Thrive, balance is even more important, as if a certain organ/organelle is even stronger than others, there a really high chance that the other cells will just spam that one organ(elle), making the game seriously boring and repetitive. Also, when the player plays a second time, it'll probably go the exact same, because that same organ(elle) is just as OP as last time, and the cells will still evolve the exact way. So, how is Revolutionary Studios going to solve that problem?
(How is Revolutionary Studios going to solve the problem of every game going the same way anyway)