Corki, a symptom of the overnerfing mentality
From 30% pick-rate to 1% pick-rate. More importantly, despite such a low pick-rate (probably Corki diehards), he has terrible winrates in all positions (44% ADC, 46% mid). Riot needs to stop buying into the hype train for FoTM champions. Corki needed MINOR nerfs. I even said that then. What he got was a gutting.
His burst was excellent and he had nice roams but that's basically his entire kit. Unlike most mids, he has no CC and falls off quite hard. It seems that whenever people see a high damage potential, they assume a champion must be OP. Not at all as Ivern even proves! Many times a bit of utility and CC can count for much more than the potential to burst hard.