Just saw a ekko with the standard assassin build build guardian angel. So we could catch him out, try to focus him down and then he would use his ult, (great, hes back in the fight and we have used cooldowns), catch him out again and guardian angel buys enough time for his team to overwhelm us. it was a nightmare. Also that passive slow it monstrous, the animation on bard makes me sad, ekko just broke his legs as he goes noway for 3 seconds.
Also I just want to mention how many champions have skills that are very narrow in use. this is why I think ekko is over the top. He has abilites that have 2/3 different uses. Kennen has a linear skill-shot that deals medium damage to one person (thats all the skill does), actually all of kennen's abilities are bland with no additional uses because of his passive. however it didn't seem to stop you from giving ekko an amazing passive and a stun longer then kennen could ever imagine.
Good thing you balanced ekko by being melee, but wait you gave him two dashes (a anytime dodge anything, and a blink that dodges point blank karma Q's.
As a support I'm having a hard time protecting people from him.
~Karma has her group shield to protect from his ult, but can't snare him or stop him from getting a way.
~Morgana can stop his engage, but you need to focus with at least 3 people before he ults.
~Nautilus has some great lockdown, but he can get a way because of his passive speed.
You really just gave him an ult that lets him do whatever he wants, placed him in a totally different league form the rest of champions.