Photo by Justin K. Aller/Getty Images Now that the NFL Draft is in the books, and the Steelers have picked up nine new heads (and a bunch of UDFA talent, ahem), most of the talk is about grades and projections. I’ll leave that to the more informed voices. But I’ve been thinking about veterans too — especially on the outstanding Pittsburgh defense. This spring, the team brought back Vince Williams and Tyson Alualu, both of whom seemed to have two feet out the door. Meanwhile, Steven Nelson was flat-out released, while Mike Hilton and Bud Dupree signed with other squads.