Sejuani change?
shes just so barely mediocre i want to call her bad atm with the current state of the game.
Maybe give her a multi-man knockup on her Q-Charge thing, but a lower knockup duration. Aka it can hit multiple enemies.
I mean shen has a multi-man taunt and an aoe AA stopper, but after you use sej's ult she becomes awful. Especially if a marksman builds QSS, then you turn effectively 100% useless.
I play a lot of sej.