I may have dreamed up a fix for this awhile back, but the though eludes me now...
Basically, as I've said before, GP HS and Holiday weapons lead down the road to hell.
Continue with this theme and, roughly speaking, you will inevitably end up with an entire community of Crystal Bow users.
My first fix would be to strip everything, and build a solid vanilla game + gun skins (that would be achieved through GP, HS, etc).
This game is a wreck, and will only continue to get worse until you go vanilla. Only after this should you start to formulate ideas about how to fix the basing motivations.