Ekko's kit has a toxic philosophy behind it
There are exceptions to this rule. Tryndamere USED to be super broken, but now he needs his ult to do ANYTHING with all this CC. Same goes for Olaf
I'm talking about champs like Ekko, where his kit is so overloaded he doesn't need his ult for a 3v3. The only point of his ult is a get out of jail free card when you over commited, or a free disengage from a bad fight for him. It's barely possible to punish him while his ults down because of an 80% movespeed bost on his passive, a huge aoe slow or huge aoe 1.75 second stun, and possibly two blinks, and a huge slow on Q.
If Ekko makes a bad fight then ults out unscathed, and I decide to stay and punish, I should BE ABLE to punish him. And not get "assassinated" by a full tanks burst because he can endlessly kite me.