Carried the pats offense on his back? He had 4 more carries than Henry last year. 22nd most carries in the league, 22nd most yards from scrimmage of the backs. On a team that passed the ball more than any team other than the chargers despite having the lead most of the year. Dion didn't carry that offense, Brady did.
More talented? I won't try to refute the opinion but we'll disagree. He brings things Henry doesn't and vice versa.
It's going to be a really good tandem, but I will agree that Dion hurts Henry's value more than a rookie likely would have, and probably a bit more than my preferred FA RB, McKinnon.