Hutson was filling the "Offenseman" role. Thought it was brilliant of Carle to stick him and Buium together, and play the hell out of them. Buium improved as the tourney went on, and his role became clearer. I think it was odd for him to NOT be the main offensive Dman on the team, and to play a support role in that regard.
I don't think Buium has the body and speed of Faber, but has way more offensive talent at the same age. It's hard to compare the two, because what Faber was in college vs. what he developed into in the NHL, seemingly effortlessly, is hardly normal. Most college prospects, even top ones, take time and effort to become good NHL players.
It would be more normal for Buium to take a couple of years to adjust to the NHL, with some time spent in the AHL. Fox didn't play in the NHL till his D + 4 year, Faber the same, Makar his D+3 year(though he played NHL playffs in D+2). Expecting Buium to come in immediately in his D+2 year is asking a lot.