I haven't watched him for a while, but I followed him when he was breaking through and at that time I did not rate him as a world class talent but simply a great one.
I think he can be a great striker for a Europa League team or something in the future but I don't see him becoming a striker for Madrid or a world-class team.
What is clear is he is an absolutely exceptional athlete and probably one of the best athletic talents at this level of football. He was made to play sport. He is also a very composed and delicate finisher. However, I think he relies too much on his sprint speed and power to create space for himself and he takes too many touches. He doesn't have the tactical aspects of his role you would expect at a world-class level, his back to goal play and movement has a lot to improve. This is why despite his great finishing ability and pure athleticism his goal production is not close to what you would expect it to be.
In a league such as the Bundesliga where teams attack and play with higher lines than in other nations, and where it is a high scoring league in general, his numbers are a bit surprising considering how much he has to work with in terms of physical and technical talent. This is because of his flaw in game intelligence.
His xG this season is
only 10.8 in the Bundesliga which is very concerning. Top strikers are expected to have a very high xG by default and its a very good marker of what strikers will turn out to be goalscoring machines. Playing for an attacking and highly ranked team in the Bundesliga, he should be getting into far better positions than he is and reaching many more chances, but he isn't. If he is not getting many chances at Leipzig in the Bundesliga, will he get them at Madrid in LaLiga or in the Premier League? The natural answer is no. This is what distinguishes someone like him from someone like Haaland, Haaland has similar physical attributes and actually worse technique but is simply far smarter with his movement.
TLDR : Great athlete, great finisher, but seems tactically very inept, and that is one of the very important attributes an attacker must have to be successful in production.