If you really get into it, I think we will find that he's gotten his core offensive skill players from guys already in the league. Patten, Fauria, Smith, Dillon, Moss, Welker, Amendola, Stallworth, Gaffney, Blount, Hogan all were vets in the league. The home grown offensive talent is a much shorter list: Branch, Ben Watson, Edelman, Gronk, the other TE idiot, Sweet Feet, Sony (yeah I know he's polarizing), and of course Brady. Bill builds defense and OL via draft, fills in the rest with FAs, and he's missed on a bunch of late because he doesn't have the QB to lift them up.
I guess if you really analyze it, not much has changed. This is how he does it.