I can easily see Buium end up being Suter or Keith's size, and no one ever called them "small defenseman". My slight concerns about Buium are his average(not slow, or bad) speed, physicality, and defense. His skating is otherwise quite good. I think he is a smart player, and will be able to be an average defensive player, to go with an above average(hopefully well above) offensive game.
This guy is not a LHD version of Faber, who always excelled defensively, and exploded offensively as a NHL rookie. I guess MN fans can hope that he is the bizarro Faber, playing great offense and exploding defensively(doesn't sound right) in the NHL?
I am not expecting great from this guy. 30-40 points, and decent defense will be a win, and a great outcome for a #12 pick. Brodin was a #10, and is considered a very successful pick.