Why not make weapons like Ace, Dark blade for mihawk, Zoros weapons, Bisento ( Whitebeard weapon ), Gryphon ( shanks weapon ) have special abilities?
Shanks weapon can have Haki abilities like Divine Departure from Manga + other haki stuff like Ace could have same thing
Bisento could have moves like combined with Gura Gura No mi which would be cool.
Dark blade could have all the moves Mihawk has used in anime + Manga or even new cool original moves specifically for the mod to make even other weapons cool.
I just think weapons need a update to make them more cooler especially weapons like Ace which could have specific abilities just for that specific weapon to have.