Keeping in mind I haven't seen him as much as some of the European posters on here, my opinion on what I've seen is that his intelligence could potentially lend itself well to playing with elite offensive players.
I think Andersson brings a good amount of offense because he sees the flow of the game well. He positions himself well, knows when to shoot and when to pass. I'll agree with the assessment that I don't think he's a first line guy. I don't think he quite has that top end offensive instinct - particularly a top-level shot. He has good hands, but they're not quite top-end either.
He could, in theory, compliment just about most players because he'll adapt to their skill set. I think his offense depends on his role and would increase with higher skilled players. Ideally, you'd pair him with someone who is a shoot first type of player or a guy who gives him some time to get to the front of the net, because I think his goals are likely going to come from deflections, chip-ins and rebounds.