I don't really agree. For starters it is tradition for suppression to be point and click: there's only 4 abilities in the game that suppress and every one is a targeted ability. For another, suppression is an ult-only mechanic. While targeted CC is frowned on in general, there's a lot more flexibility afforded to targeted CC on ults. See Lissandra: targeted stuns are considered bad for the game in general but nobody ever complains about her ult.
The balancing factor of suppression is that while it is most certainly the best crowd control in the game, it is also crowd control on the champion that does it. Malzahar and Urgot are very vulnerable while channeling their suppression and this is a major weakness in team fights (one reason why everyone says Malz has a terrible team fight). In a 1v1 dueling scenario then suppression is very scary (though really, only Malz and Warwick have frightening suppression in a 1v1 duel) but that's really something you just need to keep in mind about them. Skarner's suppression barely tickles you and Urgot's suppression's best trait is arguably disorienting the player.
Suppression is an interesting mechanic and to be honest I wouldn't be opposed to a couple more champions making use of it. It has quite different effects for the champs that have it. Warwick and Malzahar both use it to become monsters in 1v1 duels while Skarner uses it for letting his team pick people off and Urgot uses it to ... be Urgot. And honestly even with the lack of counterplay to the moves, I wouldn't consider any of them to be among the very best ults in the game. Warwick is the only suppression I can kind of consider unhealthy simply because of the lifesteal it has. The balancing factor of suppression is as I said, the fact that channeling it makes the champion using it very vulnerable. But Warwick heals so much during his that even a team collapsing on him can take a while to finish him. Compare that to a Malz who will pop instantly and Urgot/Skarner who won't take that much longer.
tl;dr: I like how suppression is currently utilised and would only point out one problem case in Warwick for compensating for the main weakness of the mechanic. Urgot's ult will probably be removed whenever he's reworked but I'd like Skarner and Malzahar to keep their ults. They feel defining to the champions but also generally fair. Even Malzahar in a 1v1 fight isn't totally unfair because for his suppression to truly be lethal he has to put his W and E on you, which gives you time to use your own CC. The CD on his ult is probably a bit low at max rank though.