Currently, Pacioretty is due to hit 50 points despite being asleep for half of the season. That's one mark of an elite offensive player. They can suck balls on the eye test but still produce at a pace that is deemed respectable. Byron could only dream of having half of Pacioretty's abilities. Regular season Pacioretty can be quite dominant when he feels like it and has elevated forwards from his breakout in 2010-2011 onwards. Gomez, DD, etc. Those guys fell off the cliff once taken away from Max.
Byron's producing with top 6 players like Galchenyuk(involved in 7 Byron's points), Pacioretty(involved in four of Byron's points) and Drouin(five, shared with either Pac or Galchenyuk). He is not the driving force and they will not suffer when he is taken away from them. In fact, Galchenyuk and Drouin deserve upgrades over Byron but the man in charge can't build a top 6 to save his job. Byron is like a poor man's Darren Helm. Speedy and has some puck skills, but never ever consider him a real top 6 player unless the team is fighting for the lottery instead of the Cup.
Byron is already given a top 6 opportunity here. Plant him on the wing of Toews and he will not be much different. His shot totals will not go up and thus the likeliness of him scoring goals even just twice in a playoff series is near nil. He's good for one goal in an entire series on average.