It is not what is wrong here. right now pool is getting ddos'd again. The problem is if you are a top miner like I am and have 4 or 5 btc riding on each block ddos kills the action.
I agree - stability, or lack thereof, due to the recent attacks is a major issue. The pool was supposed to fallover to a different mining interface but failed to do that in this most recent instance you encountered. I've fixed that and hope it'll do better when it happens again.
It's definitely getting demoralizing - even for me!