Possible Garen rework?

This is my first attempt at something like this so some constructive criticism is appreciated.

So I love Demacia's poster boy quite a bit and not even just for the fun gameplay of being that mega tank spinning top of pain. I love his overall look and feel of being a soldier who stays in the fight no matter what. But looking at his kit, specifically his passive, I feel like there are some parts of him that really don't mesh all that well together. At times, it feels more like Garen will be running away like a coward instead of trying to fight like the hero that the lore puts him as. So this is my attempt to possibly turn Garen into a soldier who really does want to get into the middle of a fight and be the plus ultra tank who soaks up damage.

Passive: Crownguard's Adversity: While in combat, whenever a spell is cast near Garen, Garen gains stacks of adversity. Adversity stacks grant 2/4/6 bonus armor and magic resist based on level. Adversity stacks are lost out of combat.

Q: Shoulder Charge: Garen increases his move speed by 30/35/40/45/50% for 1.5/2/2.5/3/4 seconds and temporarily becomes immune to slows. The first enemy champion he attacks, he knocks back. If target collides with wall, they are stunned for 1.5 secs and take 40/50/60/70/80 (+40% bonus AD) physical damage.

W: Hero's Perseverance: Garen shields himself for 50(+10% bonus health) for 5 seconds. If the shield breaks, Garen will regenerate 5/10/15/20/25% of his maximum health over 8 seconds.

E: Judgement: Unchanged

R: Demacian Justice: Garen strikes down target enemy, dealing 175/300/500 (+ 25/35/50% of Target's missing health) magic damage.

I feel that the new passive would allow Garen to really survive in the middle of a team fight and with the new W, still be able to keep regenerating health without having to leave the fight. I took out the whole Villain passive on his ultimate because honestly, right now it just feels like such a gimmick at times. His Q gives him some CC while letting him have a way to escape by instead knocking back his opponent and retreating. I didn't really change the base stats and tbh, exact numbers I wouldn't really be great at but tell me what you all think of the rework over all.

[garen-swing]