Well as the season went on he seemed to get better offensively so I wouldn't be surprised if he put up 30-35 points next year.
I don't doubt he'd be able to do it with the proper PP time, but I'm not sure he'll get it. Most of his 23 points were ES, but so were Smith's - to push to that 30-35 point mark, he'd need consistent time on the PP, I think.
I hope Smith gets his proper shot on the PP this year, as I think that's where his value lies. Kronwall and Kindl are mainstays, as long as Kindl's in the line-up, and I think the team has enough forwards who might play the point on the PP.
I guess we'll see, but I think that DD's talents should be more focused on minute eating and the PK next season, while some of the more offensively inclined guys should work the PP. Just my two cents.