I'm not sure why people would mine on a p2pool based pool when they could just run p2pool themselves but at least it wouldn't matter too much if people dropped out since the p2pool network as a whole would enable blocks to be found faster vs a lone pool.
Also I thing planning using bitparking just as a frontend to something big would rise up the question why not just switching from this small pool to a big pool right now by ourselves? I personally don´t see a point in changing bitparking/mmpool, as everybody who is here came here because it´s what it is. At least I can say this for myself. Anyways, 939 hours is gross at 50TH and current difficulty, but I´m still here with 4,5TH, hoping in doing the right thing.