The problem is not Cho one-shotting
The problem is Cho (or other tanks) being able to one-shot faster and more reliably than some assassins. It is fine that assassins' burst is delayed, it adds a chance for counterplay - the problem is that other classes have not received this treatment. It is fine that Draven kills anyone, really - what is not fine is that he can do that faster and more reliably than, for example, Zed. It is fine that Cho one-shots (he always could, though it was harder before), the problem is when he can do that faster than Leblanc.
So please RITO, give the same "burst-delaying" treatment to the other classes too. https://ci.memecdn.com/8241314.jpg
can proceed to walk to a carry unchecked and one shot them. He's just super strong right now even without the ult as well.