We have almost reached 20TH/s of total hashing power, other 5TH/s are coming this week. Hopefully with better "luck" on the pool we should see payouts coming again starting from this week.
Old accounts are getting less performances because hashing power is no more split evenly across deposits, but it's allocated proportionally to the USD value at the time the deposit has been made. However newer accounts when completed will give their hashing power to old ones. Oldest 10 accounts are also getting a further bonus, in order to speed up completion of oldest accounts.
If P2Pool's bad luck keeps harassing us, I will gradually switch part of the miners somewhere else, however I think it's not a very good idea... P2pool is not broken and it should give the max profit.