I’m sorry, but this is completely incorrect. When he uppercuts you or slams you, you were always about to shoot or use abilities. For example, when he slams, a tracer could still blink to avoid being uppercut, or recall. When uppercut, a roadhog could always hook and shoot doomfist in retaliation. I have met many anas that used their sleep dart when hit with slam or uppercut.
The only ability he has that is an actual stun is his punch.
I agree with the uppercut nerf, but spreading false information is not the way to go. This makes it seem like either you honestly don’t know how the character works or you are purposely trying to exaggerate certain things to prove your point.