I love him the way he is!

Q is a heal that can assist with burst or help alleviate damage if he is punished for trying to use his other abilities and gap close

W allows him to close that gap in the first place and allows a ranged initiate, which is very powerful

E keeps him stuck to targets, body blocking and stutter step auto attacking is a perfectly good play style and his kit seriously backs it up

R I always take Syndragosa as a cocky enemy team pushed up against your gate can instantly be slowed and punished massively and you can easily catch those pesky blink heroes by forcing their blink then proceed to run them down and pile on the slows and snares allowing you to burst them

Ghouls is a boring ulti, but it gets the job done when you need more survivability when gap closing, may be something could be done with it -a passive hp increase or a movement speed increase or death grip/very VERY short range asphyxiate stun or wintery root+silence or something?

Anyway with that gap closing and survivability I would say it fits all together snugly
Try a D build and you'll see just how reducing its cooldowns more would be ridiculous - I always play Art has as a second tank/bruiser ans it allows for a D build for crazy damage and it can draw people to split their damage between you and your MT as you threaten and keep pressure on the squishes - I'm only D1 so I don't really know what it's like in higher level play :⁾

All i would inprove is he could really use a new model or something so he can look cool and ice like the rest of the heroes