He can master the play at this level in all areas fairly well, although there of course are some ups and downs. Definitely a top 2-3 player in the entire tournament.
But the kid got some bonafide defensive issues. He moves very much in straight lines into his guy defensively. Sure his reads are great, but it don't work at the pro level. You need to be able to play the gap control, move with the guy you are defending against. In most situations, if you can't move with the guy you are defending against, you end up 10 feets behind the play in less than two seconds if you are beat. If you move with someone, even if you are turned inside out are still there. Disturbing the shot. Just stressing the attacker.
Boqvist has been a bit of a mess playing in the mens league in Sweden.
He can become the second best player in this draft, its not unreasonable to speculate on that. OTOH, he definitely need a lot of work. I remember a young Erik Karlsson very well, the kid was such a gambler and played with so small marginals -- but he played defense the right way in terms of fundamentals. Like you could easily take 20 defensive plays in most areas from a couple of games with an young Erik Karlsson and create an instruction video of how defense should be played, not showing the other 100 plays with and without the puck were he took big risks and gambled a lot. Boqvist's issues are much more of fundamental structure. He do not play some situations right at all. He reads so well what is happening on the ice, but he is all over the place and so many sitautions are handled with bandaid solutions.
Hence Boqvist also scares me a bit. It will take a while for him to get to the NHL. That time is always a risk for a high pick, everyone are awfully impatient. There is a ton of pressure. He will be tested mentally. And the corrections won't come by themselves. Imagine -- god forbid -- that someone like Peter Chiarelli gets his hands on Adam Boqvist, pulls him out of Sweden and puts him in the lineup on opening night in EDM. After 10-20 games with some might struggles Boqvist is dumped in the AHL and most of his focus will be on learning to live by himself, in a new country, in a new city, playing on a smaller ice, for a new coach, on a new team, with new teammates and so forth -- instead of being able to focus 100% on perfecting the fundamentals on the game.
To be perfectly honest, I think you can make an argument for Boqvist to more or less go anywhere from 3 to 10 IMO. I am still wandering back and forth. His offensive game is unique, most offensive D I have seen play hockey. Fundamental issues defensively. Skating issues defensively.