500 of Pastrnaks 670 minutes last year were spent with David Krejci on the top line, generally facing shutdown competition. He does often see his minutes cut defending leads in close games. Really not that uncommon for a player who's 18 or 19 years old playing in the NHL. Especially one who's on a team fighting for playoff position 95% of the season.
His individual P/60 over the past two seasons ranks 13th in the NHL among players with at least 1000 minutes played (5 on 5). Yes, small sample size, but again you are talking about a player in his 18 and 19 year old seasons. Scoring at better rate 5 on 5 than other 2014 draftees like Draisaitl, Larkin, Fabbri etc.
He's quite easily a top-6 player. I player I would not consider trading for anyone on that Carolina list. Part of that is probably a lack of knowledge on my part about the other players, but I also value Pastrnak to the point we better be talking the Ducks Hampus Lindholm if were discussing a package for a young D.