I gotta admit seeing possibly Aho & Laine reunited makes me salivate as a Finn. But you can't discuss hockey at the canes board, it's not very active and they seem more into barbeque or whatever...
I can't speak for Laine, but from a player perspective, I think he maybe hasn't got the kind of role he has been hoping for. If you get neither the role or money, it's a clear indication the franchise doesn't think of you as highly as you perhaps feel they should. It can be argued all day whether Laine actually would have deserved a bigger role or not, but the coaching or franchise hasn't really done anything that says they have Laine as a core piece in their plans for years to come. He was picked 2nd OA and he entered the league in a storm, I think it's not completely unreasonable expectation from his side that the Jets had bought in at some point. Like if scoring 80 goals in your teenage seasons doesn't prove your worth as a player and future star, it rises the question what would or that maybe the bar is one that will just constantly keep rising.
We also keep even hearing how Scheifele doesn't want to play with him and whatever, why would Laine be motivated to stay if that's true? Franchise 1C doesn't like him, coach doesn't like how he plays the game, GM doesn't want to pay him. Hey, if no one likes you, maybe you need to also look in the mirror, but as far as on-ice play etc. goes, Laine has done everything to try and fit what coach wants of him and to be a good team mate for the 1st line. As a human being, sometimes it's not that you need to change or others need to change but just that the fit isn't there and then you move on. Who knows, maybe it's a case like that.