Dino, I certainly agree with you on the need for a young true NT. To me, that's Tim Keenan III of Alabama or Dontay Corleone of Cincinnati in the 4th. Why the 4th? They fall because they has have about zero versatility on the DL.
Got to say, though, a NT is a situational/rotational position in the NFL now anyway, so he will probably only see 15-20 snaps per game with Keenan/Corleone backing him for a 5-10 this year. Also, many of these big-body run stuffers have longer careers if they do it well--he does it well and he's only 31 next week.
Best thing about him is he can play up and down the line on run downs, and lets us move Yayha and Keanu around to better fits.