Frankly, he's not an offensive D at all in my eyes. He just doesn't have the brain for that half of the game. Plus, he has to adjust to not being able to totally outskate a lot of his competition at the pro level.
I would say that GLU is correct. Belle has not really impressed this season. He has been out due to a leg injury (he fell awkwardly, it could have been ankle or knee) for a while, and was actually playing better the game he was hurt. He's just now coming back. He has a very powerful stride forward. It's hard to tell if his agility is poor or if he just isn't using his ability efficiently. I've seen him get beaten wide fairly often, but I'd like to see more of him to determine if it's more awareness or ability.
Scalzo and Grossman have been more impressive. Scalzo has impressive offensive talents, he's just improving on his defensive play, especially because of his size. He got regularly beaten in 1-on-1 physical battles early in the season, but now he's doing better. Grossman had some scratches early in the season and a shoulder injury, but he has really impressed. He's getting more comfortable offensively in the AHL. He may not be scoring points right now, but he's looking good moving the puck. Grossman has a lot of potential. He skates well, has good size, and his offensive abilities are showing more and more. It's no longer just good outlet passes, he's now headmanning the puck and joining the offensive play. Grossman may be the one who reaches the NHL first.
Given his age and the adjustments he's having to undertake moving from Sweden to North America, Grossman is very impressive.
Kevin thanks for the update. Grossman seemed to be well thought of in Europe as well. When they took Fransson Grossman Fristric and added Belle I think realistically they wanted 2 to make it. I think they thought Fransson and one of the others. It seems like it will be Grossman and one of the others now.