Pronman wrote an article yesterday on Kakko, and I thought he summarized it well.
Pronman: Why Kaapo Kakko could be considered with the No. 1...
I don't think Kakko is a bad skater, and has much of a need to improve his skating. He's good at skating in smaller spaces, he's a powerful skater, he has good edge work. He's going to make his money with his play in crowded areas of the ice instead of by winning with pond hockey. He doesn't lug around the ice either. If he did, his skating might be a problem. I tend to think that an average skater is better suited for the middle of ice and a bad skater is better suited for the wing. A bad skater could not keep up with the play, and getting from goal-line to goal-line. You can hide their skating on the wing. The Rangers have a player like this already who I think will need to be hidden on the wing, Lias Andersson. Kakko's skating is good enough to keep up with the play.
I think keeping Kakko, whose strengths are almost entirely based upon parts of the game other than skating, on the wing is probably counter-productive to how you want to develop the player. If I'm coaching the team, I want Kakko to watch tape of guys like Kopitar and Barkov. You want him to turn into one of those centers that is physically difficult to play against, along with being incredibly skilled. He has the skill part. He has potential to be a physical 1C. Thats what he needs to now develop. This is the type of center that a rookie would hate to play against instead of someone like a McDavid. A skilled rookie might be able to skate with McDavid. It would be much harder for them to physically keep up with a player like Barkov. Kopitar is notorious for being the hardest face-off guy in the league to beat because of how strong he is in the circle.