Colton Parayko was the top scoring Defenseman every year he played at Fairbanks. Parayko is much more agile and seems much more athletic to me.... aside from height I think that is a poor comparison. More Mike Commadore than Colton Parayko.
Parayko's best year offensively resulted in 26 points in 37 games (2013-14), two points ahead of the second-highest D on UAF (Michael Quinn). In his draft+one season he scored 17 points in 33 games for UAF. In Bahl's draft+one season he scored 34 points in 68 games for Ottawa -- a similar percentage, albeit in a weaker league with younger and smaller opponents on the average. I've said several times that Bahl will never be Parayko offensively because Parayko quite frankly has a far superior shot, but I would have to say that Bahl shows similarly solid offensive instincts -- he's a good passer and is smart when deciding when to pinch in the zone or join a rush.
I don't think that anyone is saying that Bahl is an elite skater -- I think the point is that he's very mobile
for his size, much like a Tyler Myers. But I think the point with Bahl is not whether he scores 25 points or 35 points at the NHL level -- this difference will certainly not define him. The point is that he is already a force defensively, with the potential to improve a great deal in that respect with proper development. You just can't teach Bahl's strength or relative athleticism for his size -- they're pretty rare traits. He's going to be a force in the crease, along the boards and in the corners, plain and simple. His wingspan combined with his mobility are a combination which means, quite frankly, he takes up a ton of space and is very difficult to get around. He's also competitive and smart both positionally and with the puck. He's obviously not going to be a guy opposing forwards want to go up against, and that's the point.
I don't think I'd put the pressure on Bahl to be the next Parayko, but I do feel it's a more apt comparable than one you used in Mike Commodore. I think, ideally, Bahl will be more like a hybrid of Parayko and Brandon Carlo (who is one of the most underrated players in the NHL), except with better offensive numbers. To wit, Parayko and Carlo are two of the best shut-down guys in the league -- but while Parayko is a 30-35 point guy, Carlo is about a 15 point guy. I think it's not a stretch to say that Bahl will be elite defensively like those two, and score somewhere in between those two. Were that the case, we'd be talking about one heck of a hockey player.