My views are from much bigger sample size than just this U18 tournament. I just think he has always been physically mature and that has deluded people into thinking he is a top-3 pick in his draft when he has managed to do solid against people older than him. But I don't think he has ever really destroyed any leagues or competition he has been in.
He is still a good player in the future, propably just not in the top-6 material.
The problem with this argument is that it's so arbitrarily applied. Yeah, it's probably true on some level. But it's true for many other projected top 15 picks than Lundell, and he's probably not even the worst offender, but he's gotten farther on what he has than most of the others to whom it might be applied. I also feel like this argument wouldn't be applied if he was say, 5'8" 185", as opposed to 6'1" 185, when in fact, the shorter guy has just as much of a muscle advantage as the taller guy, and even the advantage of a lower center of gravity. Furthermore, as the taller guy at the same weight he has more frame to fill out left. Some prospects legit have a lot that they could fill out, both in strength and explosiveness, like say Lucas Raymond on Jean-Luc Foudy, but many other guys are just as close to their ceilings as Lundell, maybe more. It's incredibly difficult to do what he's already done this season. If I'm going to discount that, I want to be fair and discount everyone who also physically matured before their counterparts. At which point, I think there is still a very strong case that he's in the top 3.