How did hard forking after the DAO hack increase trust? Wasn't the whole point that "no one" could modify the block chain or the results of a contract?
Now it's established that there's a chance a contract can be "too big to fail".
I think it would have built more trust if they had let the money go. To paraphrase a saying, they would have spent 15% of ETH on training everyone to build safe contracts, and to vet contracts properly before "investing" in one.