Illaoi isn't even that broken people...
In my opinion Illaoi isn't even on the top 5 people i wanna ban. She pretty seems pretty sluggish and has abilities that are easy to dodge or avoid. Also if you think about it there are way more champs 10* more op than her that if released today everyone would be complaining that they're too op. Like If Annie was a new champ that was released today wouldn't she have a %100 ban rate? I give it a few more weeks then people will learn how to play against Illaoi and regret not banning jax instead in all those past games.
