If, by some miracle after claiming all bitcoins were stolen, MtGox finds most or all of the 'missing' bitcoins and starts trading again, I hope no one in the bitcoin community ever does business with them again. In any way, shape, or form. It's a company that claimed 200k of bitcoins were stolen, then oops, found them underneath the couch they haven't checked for 2.5 years. Maybe I'm being harsh, but it doesn't sound like a company I would trust with my money.
OTOH, let's say gox returns to business during April. What's the chance they will do the same trick again during 2014? What's the chance some other exchange will do it during the same period? Some people will still trust gox due to this perceived probabilities.
