Bytecoin has the same problem. The reason this is happening is not enough investment from the pools' side. Miners want fast payouts, this happens when the pool has big % from the network hashrate. Serious pool owners should not only invest in a VPS/server, but also in hashrate to provide fast payout for the miners. If you have 0 miners on your pool how do you expect someone to join? What exactly they are paying this 1% for when they basically solo mine?
I hope those questions will guide smaller pool owners to the right direction.
I posted pool fees on in the first post and I hope this will lead to diversification.
Non diversification is a problem for the network health, but market drives it all.