Whatever that will give more voting power to users with non-trival amount of SP (total circulating supply / number of users (accounts)) ratio, which is currently about 2400 SP, is right direction. I would give best power ratio to users on 10% SP behind this ratio to create additional demand for STEEM. Logarithmic function with center on this ratio or slightly beyond it would be best for platform and users but whatever that goes close to this solution is good. (I know you're also aware of splitting accounts and bots, but with bots we need to deal another way). If I understand it correctly, currently reward power is exponential which is totally wrong. Linear is better but still not ok, we need logarithmic.... totally reversed to current state IMHO.