Obviously After is the easiest answer, but scientifically it's incorrect cuz he is not the independent variable here. The difference between this year and last year is the meta.
The problem is, none of them plays a flash role properly (except nobody plays skye), so the Skye nerf and double init meta are bad for them.
Also, Raze meta might be another problem (not as important tho), Kangkang is the worst Raze in the playoffs if we only talk about movement
keep in mind I'm not saying after is a good coach