Here’s TSN’s blurb on the Pens-MTL matchup....
This is probably the most lopsided of the eight potential first-round matchups. Pittsburgh has a distinct advantage just about everywhere on the ice, with one exception – they’d be facing one of the most puck-dominant teams in the league in Montreal, who actually carried shot differentials equivalent to the Vegas Golden Knights. That’s not insignificant, because Montreal was actually a goal-positive team (+7) at even strength. But in all other game states they were -16, and that’s bad news against a now-healthy Penguins team that tends to burn opponents on special teams.