Everything Derek Plante said is true, but I want to add that I think at times he gets a little too shot-happy. In 2009-10 he was creating more offence, being more aggressive. Some aspects of his game improved last year, but his scoring was at times (at least when I was watching in January/February) more one-dimensional. He'd get comfortable playing Dany Heatley, just getting open and finishing.
At the OHL level he can do that as well as anybody, but if he's going to be a legitimate top two line player at the next level, I think he'll have to get back to being more assertive offensively, and creating more offence. Improvement in terms of skating would help, not just in speed, but balance and agility. He's the opposite of a guy like Logan Couture whose all-round skating was really underrated.