Ekko really needs his numbers turned down, and make a few effects cut from his kit.
His shield shouldn't slow AND stun.
Remove one or the other.
His shield should be starting at 100mana and starting at like, 60, not 150.
His Q shouldn't have such a high AP ratio, especially if its going to land for free on the return because of a huge slow. At most it should be combined 60%
His E should have much lower base damage. start at 20, increase by 20. Not to mention, increase the bloody cooldown at later ranks. It should be hovering around 10 seconds, not 7.
His R should have a mana cost - he deals free magic damage on hit, his mana should be tight and his ult being manaless is dumb because it gives him full unrestrained access to the rest of his kit because his R can save him no matter what.
Not to mention
"500 + 130% AP"
With its radius, it should be far lower. Shaco's ult is harder to land than his and half a quarter the radius and doesn't even get a 130% ratio.
His Passive is horse crap too. 231 base plus 70% AP on a three second cooldown...with a slow....and a speed boost....that applies spell effects...
Who is in charge of designing champions, because he actually needs to be fired. These latest champion releases are entirely cash grabs and LCS BIG PLAYS crap.