Kayn's spells feel clunky because they lock him out of basic attacks and each other

A very simply buff both to make him properly viable as a fighter (as of now he feels like a less effective Talon) and to make him a lot more satisfying to play would be to simply reduce the "stagger time" of his Q - the circling sweep leaves him standing around doing nothing for half a second where it feels natural to transition into a basic attack or his W.