Power is already distributed over multiple accounts by various individuals, so the non linear curve didn't really support the idea of a single account per individual. If that is indeed the only reason for a non linear curve, we shall go immediately to linear. I find it very very strange accounts with high SP have super Powers over smaller accounts; That concentrates even more power at the top creating a power structure very similar to the real world, meaning: only a few have almost all power in their hands creating a very out of balance community.