There's no doubt that the Canadiens would be a more formidable team with Nicolas Deslauriers. In recent weeks, we've seen Justin Barron, Cole Caufield, and several others targeted with solid, borderline hits.
The lack of size, coupled with the fact that the Habs take a lot of penalties and don't produce much on the power play, means that other teams do as they please against the Canadiens, knowing that the risks of paying the price are minimized.
Unfortunately, given the mindset of the Canadiens, I highly doubt that Kent Hughes would want to acquire him, but we are still allowed to dream!