Pre-draft his ranking was all over the place. Dobber, Elite Prospects, and McKeen's all had him top 10 overall, with Dobber having him all the way up to 3rd overall. Conversely, central Scouting only had him 9th amongst Euros and Button had him all the way down to 27th overall. Pronman had him at 22. Sportsnet, McKenzie, Wheeler (The Athletic) had him 11th, 12th and 13th respectively. 3rd to 27th OA is just a huge spread in these rankings. Bruins felt fortunate he dropped down to them.
Amongst Bruins fans you are obviously getting the "few good prospects" bump in his standing. But, its not just Bruins fans that rate him highly. Everyone agrees he is a top top top notch skater. There were some concerns over coachability as he forced his way to another organization in Sweden before his draft season and there are concerns he is TOO pass focused. If he hits, you are hoping for a William Nylander, but folks view of his chance of hitting are obviously all over the place, so it really depends on if the Ducks (or AZ for that matter) are closer to the 3rd OA group or the 27th OA group.
edit:
If you are looking for pros of his work since he came to North America:
- He has shown a willingness to battle and get in the dirty areas which speaks well to his ability to not just be a perimeter player in the pros.
If you are looking for cons:
- He isn't producing like you would hope a potential 1st line talent would. His proponents point to the fact that he is a playmaker on a bad team and you need people to be able to finish, but that excuse only goes so far.