Nix' prowess in player evaluation is equivalent to Mario Mendoza's batting average. His best move thus far has been taking what should become a very good player with the third overall pick in the 2011 draft. The 2010 draft is looking eerily reminiscent of what Buffalo did in 2006-2007 when Marv was supposedly in charge.
The Bills 6 UFA signings in 2 off-seasons are very underwhelming besides Nick Barnett. Cornell Green, Brad Smith, Andra Davis, Dwan Edwards, and Tyler Thigpen are either backups, not with the team, or replacement level starters. Even the players re-signed while Nix has been GM are extremely pedestrian. Merriman had epic fail written all over him and he lived up to it, Kyle Williams is a nice piece but not a game-changer in the 34, Fitzpatrick is back down to earth as a journeyman backup, and Drayton Florence's toaster is always on.
It matters when the owner doesn't know anyone to be GM and settles for the last guy he knows. That's usually not the way to rebuild an organization.