Current spot of Mordekaiser

Hello. So, Riot decided to shift Mordekaiser into more tanky champs. Personally I think, that this is great idea. He is big metal guy, so he should tank a lot of dmg at first place, and do some dmg too. But, what we got now. While morde dmg is ok, as for tank, his endurance is also great, thanks to passive, he still lack of 1 thing, that every tank should got. CC This is, why he isn't viable in competetive scene. He don't provide absolutly ANYTHING for team. Not a single slow (Rylaia don't solve this problem). Some of you could say, that he got powerfull ulti, that placed right can solo whole enemy team. But keep in mind, that Riot change about what scale ulti now. Also dmg it provide doesn't compensate lack of utility. He is slow, his dmg is now medicore, his endurance isn't that bad, but he is soooooooooooooooo easy to peel. Every tank, except tankyness, some sort of cc and some sort of dmg got something more. Rammus got his ball, Shen can ulti any ally, Tham Kench will be able to protect his carries by eating them, Braum have that shield. I mean, there is morde, which have his soulstealer ulti. I don't think, that if he got some small crowd control, that shift him into OP spot.

TL:DR So, my idea is to change his Q, so if enemy have his movement disrupted in any way (stuned, slowed, knocked, snared), Q would stun him for 1s more.

Or simply if his Q hit target alone, it stun target for 1s.

What you think guys about it