>>5944787I've had the rocket elbows happen on Anasui and Hermes, too, but not much else.
Kiss has that swappable back piece that just friction fits so it will dislodge constantly unless you glue it in, and the floaty neck piece might be annoying.
Diver Down's arms detach to use Anasui's effect pieces and they can come off too easily sometimes.
That's about it.