i do not see Heirlooms listed as either upgrades or to lock as item in said slot (Chest, Shoulders, Weapon). while leveling these scale with level and are usually better than anything else plus the XP bonus. can you add them so the sim can adjust for actual items on character?
WotLK heirlooms is still on my list to get back to… they changed the format they used to scale heirlooms many times over the years, and classic servers are using a sort of hybrid of old and new formats, so I’m not sure how they’re doing it.
It’s also tough to test because I don’t have any of the heirlooms on my own characters. Once we finish the 10.1 patch if someone wants to do a little testing for me using some debug versions of the addon I could probably get them working.