You realize you can stun him mid ult right? It does take several seconds to fire off where he can’t do anything but spin after all. Makes teamwork pretty OP vs him. Specially if you have a good Montana or Kelvin. Hell even a well played Miko can counter Dreadwind.
Also there’s a good chunk of characters that certainly can escape his silence/dreadwind combo. Like Thorn with her disengage melee, Benedict with his triple jump (Not the skill just the mutation) Melka… etc. Or the classic just sublimate and murder him as Kelvin. Then it’s about 60 seconds where you can punish him and his team.
Those are pretty big weaknesses for someone who is melee with less HP then Marquis.
His kit is so backloaded into his ult it’s kind of silly at times, the only changes I could really see is them nerfing Dreadwind and putting power into the rest of his kit. But they can’t really touch Dreadwind at the moment without gimping him almost entirely.