Kaiten is not button bloat, far from it.

It has a fluid spot in the rotation, and feels great to press.

What they need to do, is straight up just combine OTHER abilities into 1 button like PVP.

Why do you need 6 buttons for the 1-2-3/1-2-3/1-2 combos on samurai? Just make it 1-1-1/2-2-2/3-3, combine the combos into singular buttons and you immediatly save THREE bloats.