The other alternative is get another two or three pools to the same size as the top two. Alongside P2pool, this would effectively stop this from being an issue.
SECURE THE NETWORK
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Remember fees are lower on p2pool generally, payouts are higher and you're helping the network -
http://scanner.etyd.org/ will show you all the p2pool nodes that can be detected and selecting one close to you geographically is best (also setting one or two others as failover in your miner config) - the advantages of p2pool are manyfold, including that the pool operator cannot lose or steal your coins either through malice, incompetence or getting hacked, because they never hold the coins (they are paid directly to the miner), also, if the p2pool node you are on fails, you still get paid your shares because they are distributed on the sharechain, and not stored on any one node to be lost due to a failure.
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Actually i really like mining on p2pool, but with current sharerate is too high, is almost impossible to get share for little miner.
I'm sorry if this already asked, but is it possible to divide p2p network into two ? i mean, make another with less share spread but with lower sharerate so little miner can join p2pool too ? like the old p2p network if i remember correctly.
i don't mind getting pay less frequent but with high possibility to get share. Last time i try p2pool, only get 1 share /12h with my 280x ...
*i don't really understand how p2pool work, but it is possible to do this ?