How is new Skarner OP?

I played him both before and after the patch. Besides the stun not much changed for him outside of lane. The shield is nice but the people I go against sit where k can ult them out for my team to get. The way I see it is Skarner can go with any team comp and is finally able to fight 1 v 1 with almost anyone and maybe even 2/3 v 1 in his zones. But usually all the Team fights happen pushing down a tower where I just single out a squishy or the tank if we can burst him. After that if I still have my E I slow people and stun them but the stun and slow aren't new so it can't be that. So please tell me why his is now considered so strong.

PS as of today his popularity over the past 7 days is around 6% meaning he is not being picked up by everyone like say Vayne who has 35% popularity

Edit: I personally don't think he is OP which is what people seem to be thinking. I want to know why people think he is OP or what they think makes him OP