*all of this is prior to today's game*
I think we need to remember that the SHL is the clear 3rd best league in the world. It's much closer to the KHL in strength than it is to #4, so it's not only exceptional that Hallander has a 1st line role with the team, but that he's doing as well as he is with the spot. Another thing is if you've actually watched him extensively (like I'm sure very few have) you'll see he's far better than his statline shows. He's constantly in the play, setting up chances for himself and teammates.
He's 11th in the league in U21 points, with five 1st round picks ahead of him (Lundkvist, Veleno, Holtz, Seider, Raymond), and one guy I believe is the best prospect in the 2021 NHL draft (Eklund). Of the other 4 guys ahead of him, three are 2nd round picks (Berggren, Drury, Hoglander) and the other is a guy that was a double OA that was picked in the 7th round 2020 (Oberg). Other than Berggren, Drury, and Lundkvist he's one game great game away from being ahead of everyone else in points. Let's not forget too his sh% and his oish% lags behind virtually everyone else on that list too, so the "lack" of production is probably far more of a fluke than something to expect going forward. Not to mention for as good his team is, they score very few goals compared to other good teams. Plus as I mentioned, he's playing in such a tough league his NHLe is actually ahead of guys like Amirov, Miettinen, Hirvonen, etc who people are claiming to be having fantastic offensive seasons and loving their upside.
His play driving is exceptional. On a fantastic analytical team it's harder to drive play as you need to be more than good/average at it, he's the best play driver on the team with a +5.1 rel.CF% and a +4.1 rel.FF%. We don't know how transferrable it is to the NHL, but it's a good sign when a guy like him who I believe would play a perfect support role to either of our top-2 lines is able to dominate possesion the way he is.
There is literally 0 reason to be down on him. I see a fantastic middle-6 play driving winger that like Hyman/Hornqvist has the ability to be effective anywhere in the top-6.