The overreaction on Dahlen is extreme. He was a 2nd round pick in 2016, look at the players drafted around him. Some have played games in the NHL, some are struggling worse than Dahlen. He's doing better than guys like Smith, Kunin, Jones, Senyshyn, Steel, McLeod if you include PPs. And 5v5, doing better than Bellows, Kostin, Asplund, Katchouk.
They are better organizations at this time, much better AHL teams and when you take that into context.
I think expectations were too high, this is an immature kid playing against big men, I'm sure he's intimidated. The AHL's 3rd/4th lines have former goons in the CHL or converted goons from the NCAA. Dahlen is built like Pettersson, he's barely 180 pounds, Pettersson is a 172. And he's 20 years old, he's not a conditioned, lean Henrik Sedin 180 pounds.
Just look at Lind and Jasek, it is so visible at how physically immature they are. They might be listed at 180~, but that doesn't mean they are physically strong. They are barely 20/21 years old.