Totally minor thing, but not sure where else to put it... If you take treasure from a treasure map chest that you didn't dig up, you become a criminal. Unless the person who dug it up is in your Party. I'd suggest also removing the criminal nature of this if you and the treasure digger upper are in the same guild. No clue what's era-accurate here, but this would make intuitive sense to me at least.
Flagging as a criminal for taking items from a treasure chest which you did not dig up is something we left in place as a minimal repercussion for "stealing" treasure that isn't yours. The criminal flagging can be bypassed by being in a party with the chest digger, though at first glance I don't see any downsides to allowing the same methods for guild members.
If a guild takes a bunch of new players on a treasure hunt and perhaps wants to dole out the loot in a certain fashion, it may be ideal to require party membership for sharing a chest. Just a thought.
