Nice to see him slowly getting his things together. He said in an interview last summer here in his hometown that he's trying to get back those elements of his offensive game that he had when he was drafted.
I think he was always most likely to be a solid 2nd liner with a small possibility to become a 1st line star (no franchise stuff tho). He was likely to be in the opening night roster of Sabres right away from the camp in 2013, but was injured in his last exhibition game. After that it took him all the way to WPG and change in style of play to get into NHL lineup regularily.
It has been speculated that the wrist injury he got in that camp wasn't treated properly and that it should have had a surgery right away.
Anyway, he was drafted as a skilled goal scoring winger (he broke the points records in Liiga as a 17 year old if I remember correctly), but something happened after that injury. So I' m just hoping he starts to net his golden chances more (he had a wicked wrister and was lethal between the dots, especially on PP).
Edit: and in WPG he was already setting his linemates golden opportunities 1 to 5 times a game, but he was playing with Matthias and Lowry and whatnot, so that was a factor to his point totals too. Wasn't scoring his own chances either though.