i think bosses should have more comprehensive drop lists. once u got all good parts u dont care about box drops anymore pretty much unless to sell to shop for gigas. it would add a lot to the game in my opinion if bosses had stuff that only dropped like 1% or 5% chance, really rare items. they could be cosmetic like E parts, but powerful (not OP tho). this way people maybe wont just grind for gp and stuff they can grind for rare parts. i remember some events that did this like halloween boss guy dropped rare parts and it was a huge success so you dont even need to really test the idea or ask for feedback. people like it.