NHL European Scouting Service
“Joonas plays very well at both ends of the ice and moves the puck well from both sides. He’s a good passer on his backhand and is utilized on the penalty kill. He is physically strong on the boards and is hard to knock down in this level.”
Not that it means much, but The Hockey News' preview mentions that Nattinen, in the best case, could turn out to be exactly that. However, if he turns out to be a big 3rd line centre who can play at both ends (basically how his "curve" is projecting), then I don't think I or anyone can complain. Seems like a great pick and a solid player to watch develop.