Ekko's slow is TOO DAMN HIGH
It's a multi target piercing slow, that scales with ranking, ranging from 32 to a whooping 60% slow. I'm not even mentioning that it can apply 2 stacks of his passive to multiple targets, but I think that these numbers are just too high. Give it a flat 40% slow and it'd be alright.

then act like they're fairly designing the champions.