I'd love for the team to keep Nylander at the wing for his career with the Leafs. He'll be able to make more of his plays on the wing, have less responsibility on the ice and be able to showcase his playmaking ability a lot more. I'd like him to avoid going up against Crosby, Malkin, Bergeron, etc. for a full year and chasing the play if he were to lose the draw. Instead he can cheat a bit at the point.
Why do we want to develop him into a one-dimensional winger when we can develop him into a two-way centre? He's better defensively and fights harder for loose pucks than what his draft reputation suggested. Some people made it sound like we were drafting a lazy floater who relied on talent, but from what I've seen, he's a hardworking guy.
Size? That's not an issue. He's projected to be the same size or bigger than Giroux, RNH, Datsyuk, Duchene, Pavelski, etc. Plenty of top notch centres around the league are his size.
Dineen has sung his praises, saying he's staying late at practice, at the gym, eating properly, etc. To me it looks like Nylander has both the mentality and the skill-set to become a solid two-way skilled centre in this league, which drives teams success much more than more one-dimensional wingers.
Not to mention centres are able to use their playmaking abilities more than wingers. They can distribute the puck to both wingers with ease, that's why the top guys for assists are typically centres (7 of the top 10 guys for assists right now are centres, same last season with only one winger and two D in the top 10).
I would put Nylander in the AHL as the Marlies #1 Centre next season, and make it a focus of the coaching/development staff to get Nylander to commit to learning all the defensive nuances that come with the position. He has the skating, hockey IQ, and work ethic to do it.