I don't think he'll ever be producing points at a rate even close to EP. If that's what's expected you'll be very disappointed.
On the other hand, he's already an SHL elite 2-way C and has the ability to create space and time for his teammates. And there's no leaking on his own end (in WJC he was not on ice for a goal against during the whole tournament, so far in SHL he's 5-1 in total where the -1 was an individual D mistake). He reads the game on a level I've not seen on any player I can remember in SHL for years, always at ther right place at the right time, taking the right decisions. But the points, especially goals, has to come from others.
He does his best from his own zone up to the blue line, and along the boards. Although, he's got a very good shot when he uses it, and that probably is what he needs to learn to do more often. Something he has in common with a lot of Swedish players, it's not part of the Viking DNA I presume
In a recent interview he expressed feeling good coming back home. The time in US had been very exciting but he felt a bit tired from constantly living in hotel rooms. Anaheim actually put him on 1 week forced vacation after coming over here, not even allowed to practice with the team...
Regarding SHL/NHL difference he claims the main difference is that there's more time with the puck over here. Also AHL is a very fast league, similar to NHL in that respect. Quite natural given the rink size difference I guess (not having personal experience from North American hockey).