Ekko nerfs? I say yes and no.
As someone who has had weeks+ to play with ekko on the pbe I can say with confidence that he has very glaring weaknesses. If he's in the jungle, pick someone that has a strong level 1 fight and invade the little guy If he's in mid set up a nice shiney camp fire and let him know to come hang out.
During teamfights multitask and keep track of the "echo" behind him Give him a single stun or snare and he's done no complaints no nothing.
Now, he's not perfect, he does need nerfs but I hope that rito gaems looks into this post to see where a recommended nerf is Add a cost to his ulti, up the cooldown, and change the scaling from 1.3 - 1.1 This is all just IMO and speculation on what would work, but I say don't break his kneecaps on the first patch, but edge him there to find a sweet spot. And he'll be one of the most balanced champs in this game.