I agree with you. And if you have not notice, I've never said he's going to be a top 5 player in the world, I think that's incredibly unlikely, if not impossible.
What's ridiculous is saying he doesn't have the talent to be world class. If world class is only considered top 3 strikers in the world, perhaps not, but Hist includes guys like Cavani and Rooney, etc in there. So let's say top 10 forwards in the world at any given time are world class. Morata clearly has the natural talent and ability to be a top 10 forward someday. He also seems to be a very hard worker. Saying his absolute limit is Higauin level is just absurd. If he didn't get to Higauin's level I'd be incredibly disappointed. His talent and football intelligence and work ethic places him more in the World Class potential area, as also evidenced by his smashing success at every level he's played at prior to senior level. Add to that his excellent goal to game ratio between last year and this year and I really don't see how anyone could suggest this 22 year old doesn't have immense potential. He clearly does.
Anyways, he's still a raw and unfinished product, so it's all speculation. We can all agree on one thing, he was immense today. And that makes me happy, because he was a big part of the reason Juve won.