Barnett dug himself this little hole a couple years ago by refusing to move from the MLB spot.. which now in a 3-4 he is a fit in the middle.. not stout enough to play it IMO.
He would make a better edge backer if he had developed any type of pass rush skills, which were stunted playing in the middle of a 4-3.
So like Zombie stated.. he is a good player but a bad fit because of his style of play and the lack of depth in his game.
With his salary upcoming I think it has become a logical question to ask is will this be the end for Nick in GB?
I happen to think so.. but we have seen Ted and company hold onto players with salaries that don't seem to match their play.. Poppinga and Chillar come to mind.
"The oranges are dry; the apples are mealy; and the papayas... I don't know what's going on with the papayas!"