@Riot; The one and only buff that would fix Sejuani (Not numbers buff)
Arctic Assault RANGE: 650 COOLDOWN: 15 / 14 / 13 / 12 / 11 Active: Sejuani charges forward, Airborne icon knocking up all enemies she charges through and dealing them magic damage. Arctic Assault's charge stops after colliding with an enemy champion, but can affect multiple enemy champions if they are close enough together.
Having played Sejuani many times, I have never successfully stunned 3 or even 5 people as the skill suggests, regardless of how close together they are... but more importantly; many times the "Stun"/Knock-airborne effect is miniscule, it is a mini mini stun. My suggestion is to make it less random and less terrible... there is a very similar skill , one could argue identical skill that another champion has and works far better.
Here it is;
Gragas Body Slam RANGE: 600 COOLDOWN: 12 Active: Gragas charges forward, dealing magic damage to all nearby enemies upon colliding with an enemy, as well as Airborne icon knocking them back and Stun icon stunning them for 1 second. Body Slam's cooldown is reduced by 3 seconds if Gragas collides with an enemy.
Not only does Gragas' body slam have lower base cooldown almost all game, it also gains an even lower cooldown if it strikes an enemy, ANY enemy. But on top of that, Gragas' stun with his body slam is far more reliable and effective than Sejuani's stun. Given that they are basically the same ability, I'd say Sejuani's Q needs a buff because it is inferior to Gragas' body slam in every way except a very small range difference.
I play Sejuani a lot ... making her Q stun not completely random or often even failing for no reason, would make her a much better character. Just fixing the broken code is all I am asking, make it more Gragas' stun which is fairly reliable. That's all.
OR hell, change it entirely so it's a brand new skill... just don't allow it to a garbage version of another skill that is strictly inferior in any practical way.