Riot said that they love the idea of revisiting an older gameplay version at some point in the future as a short event but they can't due to time constraints and other hindrances. However, in a hypothetical scenario where they do do it, which gameplay version should it be and why?
The Sejuani rework really needs changes on par with what Vel'koz received after his rework. New Sej is in a solid spot power-wise but plays so different from her previous iteration, and not in a good way. Vel received sensible changes to return part of his former identity while still keeping with the theme of the rework; Sej deserves the same.
Sejuani because turning her into a CC machine was fucking awful. I didn't play Sejuani because I loved throwing out stuns every 2 seconds, if I wanted to do that I'd play Leona. Not to mention the binary nature of her E passive where you're cancer if you have 2 or 3 melee allies and worthless if your team is all ranged.
She should return to her roots as a damage tank/very tanky diver, that's her real identity
Before assassin rework... 
Rest in peace buddy.
