He is in need of the update the most, imo. I was really confused that Riot has picked Pantheon instead of him. His model is most likely the absolute worst in the entire game. If I didn't know better, then I wouldn't think this guy is a champion in league of legends, but the model of some PS2 character of the game version of some weird cartoon.
His gameplay also needs improvement.... alot.
I don't think any other champion in the game has a kit consisting of so many stat steroids like him. The only ability which is fine is his Q, the rest needs heavy work.
I mean, look at this. His passive literally is just an increased stat (health regen), his W is a glorified sunfire cape with tenacity increase. His E is auto reset with AD and MR increase. And his ult basically an extreme health regen increase.
This guy needs actual mechanics. Make him work for his healing, the same way other juggernauts have to work for their damage (Illaoi tentacles, Aatrox sweet spot Qs, Urgot shotgunknees), but give him reliable damage.