I honestly don't see why they can't lock down the account, go into the database where the information on quest completion and such is stored, and just... flip the flag on that enables him to complete that leve again, or just wipe out the quest log and make him pick up both again. It seems like such a small thing and I get they don't want to have this advertised so that anyone can make a GM do this, but seriously saying "rollback or reroll" as the only two options doesn't sit right with me. :|