Ekko Ultimate Nerf Idea

So, we can all pretty much agree that Ekko is pretty broken right now. One of his main powerful moves is his ult which can decimate your health bar faster than a fed LeBlanc's full combo. One thing I would like to point out though is that in the Ekko cinematic, every time Ekko went back in time, there was no damage brought to the monster he was fighting (the weird Urgot/Sion wombo combo). The monster did not explode into a million pieces. So I give you this. Instead of making Ekko's ult do damage, how about making it slow or stun enemies around his clone thing? This way it can be used as an escape or an initiator instead of a nuke going off. Keeping all the other abilities the same, or slightly less AP ratios, but take all damage off the ultimate.