The strength and conditioning will really help, but even with that, I think it's the decision-making that needs the most work. There were so many times last year where he'd come flying down the wing and have a great chance to rip on on net, but he'd hesitate and slow down and either flop a sharp-angle wrister right into the goalie's belly, or he'd throw the puck into the middle where it was stolen, or he'd try some weak wraparound. He generated some really good scoring chances that never even ended up with a SOG because he wasn't processing things fast enough. I think this is also why his SH% was so low--he had good opportunities that he turned into non-opportunities.
That stuff all hopefully is addressed by more experience. And of course if he's separating better from the opposition and moving with more speed, he'll have a little more time to make better decisions. I'm not worried, just surprised he was so...underwhelming last season.