I would love to see a clearer description of how the pools work once we're on mainnet.  For now, it seems like pools should keep splitting delegates so that they always are in top 100, but with as few votes as possible, such as to maximize their number of eligible delegates.  It's a bit of a race to the bottom.

Why not scale delegate rewards logarithmically with votes?  That way higher-vote delegates get some benefit and incentive, but not perfectly scaling so they don't become overly powerful.