Ekko is a failed champion.
Seriously this makes him feel so clunky as his intended design of an assassin. It works fine as tankko but as ekko you aren't able to proc you passive quick enough to do any real burst. If assassin ekko is to EVER be viable this has to happen. make it so when the Q expans into the slow field it comes he can call it back to himself. Or at the very least make it return fast the thing takes forever to get back and it makes it hard as can be to hit and stay on the carry.