I'd like to see cheaper entry fees at events. Make the pro and advanced entry fee the same amount. Pay out the field to the top 60%. Keep the top 25% a normal payout structure, with the last 35% being a more flat payout.
I think this would encourage more players to play because they may cash. I think it would also encourage more Advanced players to move up because it would be the same cost playing advanced or pro and they may feel that they can at least squeak into the last cash places.
If you feel you have no chance to at least get last cash, why would you play pro? And when the entry fees are sometimes as much as $50+ more to play pro, why would advanced players want to move up.