I had the same apprehensive feeling about the treasure room as you, and decided to make it unattached only accessible by a bridge from my main base to the entrance, totally separate building. Just in case placing other items near or in the zone may cause some wonkyness, some items were retroactively given the treasure keyword,I also had in mind that a purge will be destroying this building rather than my main base so its kinda like a decoy building, that i dont mind losing. Side question does anybody know if there’s a list of the items that already existed in the game that got the “treasure” keyword added to its description?