Needs to stop jumping the zone early and battle more in the corners. Jumping the zone early in the NHL leads to goals against. He does it often. He needs to work on that. He has all the ability offensively. Work ethic much like Kreider's needs to be better.
Anyway, it is the right move. Duke has done well and shown he will be a solid player for us for years to come. They will probably call him up for the playoffs and play him if there are injuries.