"CC is equally effective against every champion"
Just a reminder that that's a really bad argument.

Nobody has ever said "Just CC Malphite", because Malpite doesn't care about your CC. It only annoys him a little, and makes him wait another two seconds to be useful again.

These guys, on the other hand, will be stopped by CC, because the window in which they can't move is enough to either chunk them or just blow them up completely. Whereas it does not work with tanks, because they can survive for much, much longer than squishies, even against people like Vayne or Kog.
EDIT: No, I'm not saying all tanks have an Olaf ult 24/7. They are affected by CC, but it doesn't hurt them as much as it hurts squishies.
is snared during a battle she can't reposition herself and will die easily
was a hard counter to her before the rework. Not only she couldn't dodge any of his spells (for obvious reasons) but also he could shut her down during teamfights with the snare.
lol
dunno i play this guy ap into alot of those champions. and i think death is pretty good cc.
or
all mind it even more than the ones you mentioned bc they lack a mobility/invis/shield/immune to target ability that makes them more able to avoid CC than average. Something all the ones you mentioned do happen to have. Oh and for the record
U wot?
?