It's hard to believe anyone could play 500+ games on a champion with a concept as simple and straightforward as Cho'Gath and still have such little understanding of the character, what he's supposed to be, what he's supposed to do, and what the fuck you're supposed to do after you pick the Terror of the Void in champion select, but I suppose people like you continue to exist to defy my expectations, lol.
That being said, I'm glad they're buffing Cho'Gath, but this REALLY isn't the way to do it. What they should actually be doing is slightly increasing the AP Ration on Q and W, and maybe a slight bump up of either the AP or the Max Health ration on his ult. His E is actually fine how it is right now (although I do miss AS Cho'Gath quite a lot, especially when Sated Devourer was a thing, but those days are long gone, now).