From what I saw this season from those following him, he was buried down the lineup without any special team minutes and he was still able to produce (he didn't burn the league but he produced very well for the minutes he got). I saw one of his games during the Hlinka Gretzky and he was dominant on the PP so I think he'll definitely put up big numbers in the O.
I think the big question with his development is filling into his frame. If he is able to absorb more contact (like he has been able to do when playing against those his own age), I think people will really look back and wonder how he dropped to 20.