User blog comment:Deshiba/No counterplay/@comment-8506165-20140515201423

Poppy's not actually immune to CC during her ult - she's immune to anything that's not from the ulted champion, but their stuff still affects her as normal. So if gets ulted then he can still tag her with his 70% slow while the carry repositions away from Poppy, and apply his stun - not sure if he'd personally have to build the stacks, or if he'd have to be the one to add the last stack for the CC to work; I don't think anyone's tested its interaction with Poppy's ult. But whatever, point is people can do something about it unless they have literally no CC and Poppy's fast enough to get on someone before her ult times out.

But honestly if I'm playing a squishy, I'm far more worried about Vi than Poppy. With Poppy's ult I can simply run away from her - Talisman is a good way to counter Poppy's ult just by disengaging when you see her use it - or I'll explain to the team how her ult works because very few people seem to know, so I'll be fairly secure in knowing someone will jump on her or CC her if she ults them to go for me. But Vi? It's an uninterruptible, targeted ability with a relatively high damage and long range and she has a follow-up gapcloser afterwards and more than enough damage to personally burst a squishy without help from her team, unless she's really underfed, plus she's normally tanky enough to withstand burst in the time it takes her to kill someone. There is very little counterplay to that as a squishy target - or indeed, as a teammate to Vi's chosen target, bar a few specific counters. Not to mention it's even worse now that is a thing and if him and Vi are both on the enemy team, the carry's pretty much guaranteed to have both a bruiser/assassin and a melee carry/assassin on their face at some point.

There was - for a while - a plan to have CC-discarding ultimates like Vi's, Malph's and J4's to simply delay the CC until their completion. That alone would add far more counterplay, imo.