I know there are more interesting balance discussions right now

But can something be finally done about ? We are pretending that he is balanced, but he is not. His passive invalidates killing him and his R, thanks to the absurd AP scaling is just too much. Press R and half of your HP is gone. And you can come with Zhonya, it isn't a viability to use Zhonya everytime he ults. Ultimates with global effects like his and need to vanish out of existence.