Why Ekko´s Rework Wont Change Anything
Right now, Ekko has a tank / bruiser´s kit. Everyone knows this, and its the reason why he has seen far more success as a bruiser than he ever has as an assassin. An easy way to see this is to see where Ekko´s kit fits on a scale from Fizz to Poppy. Many of you will realise that his kit is far more similar to that of Poppy. He has a decent amount of cc, a dash, a shield, and an ult which, while situationally offensive, is far more commonly used defensively.
Having played a decent amount of Assassin Ekko myself, I can say that his ability to assassinate people is completely limited to whether he is able to land the damage from his ultimate. This makes Ekko extremely unreliable as an assassin because your success in assassinating a target relies far too heavily on their error (accidentally walking over your time shadow thing). If the enemy is able to avoid this, Ekko essentially just becomes a weak fighter who can heal mid fight.
Riot can increase the AP scalings all they want but this will not fix the problem of Ekko having a bruiser / tank kit. In my opinion Ekko's ult needs to be changed completely if Riot want him to be able to fulfil his role as an assassin.