I have yet to know a "bitcoin entrepreneur" to whom I would lend a pen without removing the cap first. For one thing, Karpelès was one of the top board members of the Bitcoin Foundation.
Irrelevant to the situation. You are not lending anything. Your goxcoins were never really yours. What you had was a promise to pay, just like with the banks. Karpeles got far in the Bitcoin world because he created the first exchange and the first price discovery mechanism, and made a fortune with BTC, not for reasons of trust.
Lawyers can and will hire experts to handle the technicalities, in bitcoin or any other field.
The technicalities of liquidation, not the technicalities of recovering the missing 650,000 BTC!
The thief (or embezzler, or fraudster) responsible for the missing MtGOX coins must be found by teh police and punished by law. The issue is not just return the coint to his victims, but deterrence of future crimes. If he walks away with his loot, why should not every exchange owner do the same?
And you really think the Tokyo police has a higher chance of solving the mystery than has the Tokyo police PLUS a restarted MtGox run by (presumably) competent people who have a bigger incentive to solve it?