So, of concern to some of us is that the gachas have gear that we would normally grind to get, and good gear at that. So, as potential compromise, i was thinking why not let the gachas keep those items, but make them non-repairable? Whether they can be upgraded or not, i leave up for debate. But making them non-repairable, not only will you be aware of who has the gacha item, it will still be rather restricted compared to those who worked for the item. I personally think it'd be a decent trade-off, or at least worth trying, depending on how common the item is in the gacha.
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Discord: Tonkatunk#7079
https://github.com/Tonkatunk/Mabi-Pro-Lazyfae-Mods