interesting take, Simon. I don't disagree with anything you said, really, except maybe a bit about his strength, but i have a higher overall opinion of him. I have all sorts of time for players who can control the puck as he does, at a higher level of hockey than the CHL. He was often playing against opponents 3-5 years older, who had their man strength, and i thought Buium showed he was very sturdy on his skates. His upper body strength will come ... sometimes you can't rush maturity.
He will have to learn to move the puck more quickly at higher levels of hockey, but i actually prefer players who hold onto a bit too long as prospects, as i believe it allows them to develop their puck skills, and push the boundaries of said skills. The ultimate example of this is Bobby Orr, who said many times that he would've never turned into the player he was if he had played more of a systems game, rather than the pond hockey he played growing up.
I love the imagination the Buium has in his skating and puck handling, and while i do agree that he doesn't have great speed, it's decent, and one can easily project him having above average speed with maturity and a bit of technique work. i don't think it's a problem, nor is his passing, which is more than good enough, as he creates many open lanes with his unpredictable moves.
My main question with him is his defense. Not so much defending line rushes and getting beaten to the outside(a classic problem with LHD), as that can be fixed with hard work and technique improvements. I also don't have a problem with his puck handling in the d zone...he'll learn to move it faster, i think. It's more about his play in the D zone before he gets the puck. It doesn't look bad....just sort of there. I just don't know if he cares about playing D, in general. It's sort of like a guy in baseball who is a great hitter, but only plays the field well enough so he can get his AB's.
In some ways, i wonder if he benefits from being compared to a guy like Parekh, who is less physically imposing, a worse defender, playing in a lesser league.