People would have to be pretty stupid to do a mtgox 2 seeing as what has happened to MK. Nobody wants prison.
Most criminals want to commit crimes if they know they will be caught. They only do it in the hope that they will not be caught.
As for the case of Mark Karpeles, I think it was more of poor company management skills. He fucked up yet he still kept dancing like nothing was wrong. I surely think that other exchanges have learned from this, But I cannot guarantee, that this will not happen again. Since centralized institutions are the weakest link of bitcoin. If we'd move on to decentralized exchanges then this would not happen. However decentralized exchanges are still in quite early stages of development.