Lets talk about Sion

I was playing Xayah and I was standing in a bottom lane bush and Sion hit me with his knockup from a way further distance than I have seen is possible and a friend told me about a streamer who knocks people up with SIon while in a bush and the ability appears to be further away than if he wasn't standing in a bush. I also noticed that he can actually knock people up before the chargeup is complete, which begs the question, why even have a back end to the animation. I think his ult, minion push (while it does move very fast you can avoid it by just not allowing yourself to be hit by it, considering that it moves straight from his character model and he doesn't aim it fully), and other abilities are fine, but the fact that he can infinitely stack health and hit you for 1/3 of your max hp 5 minutes into the game with a knockup that he doesn't even have to fully chargeup is a little broken. What I think needs to happen is that the animation of his chargeup should represent whether it is a knockup or not (there should be no backend of the animation that can be exploited), and I think the scaling on his hp gains should be lowered since he was playing SIon support and had double my health at 8 minutes into the game.