He was the main player acquired by the Bruins in the Taylor Hall trade. A 24-year-old defenseman who performed very well in the NCAA, he's highly promising and could be acquired by Kent Hughes for absolutely nothing.
The Canadiens have a good defensive pipeline, but let's be honest, it's not Gustav Lindstrom who will play a significant role. Mitchell could be a solid acquisition, and there's nothing to prevent him from being placed on waivers when David Savard returns if he doesn't meet expectations.