A command that refunds achievement points (and removes items from the shop from your account) would be pretty useful, similar to ::clearpatches. I've seen a few people (myself included) who have one way or another lost an achievement item that they can't get back. In my case I ::empty -ed my bank to start from nothing again, thought I'd just have to rebuy them from reclaim shop.
Maybe like a 10m fee for using the command and/or a week long cooldown to do it again so it can't be abused?