A few thoughts.
I always liked his leadership and big play ability. I hated his propensity to be forced to make costly penalties. I wonder, though, whether he would have had a lot of success this year because of the improved pass rush. Improved pass rush leads to more opportunities for turnovers...
A see a lot of people falling into the maligning of Chris Kelsay. According to PFF, however, Kelsay was the best LB on the Bills last year. Furthermore, Drayton Florence was ranked behind 100 other CBs. That goes well beyond the starters on other teams.
http://www.profootballfocus.com/blog/2012/02/24/fantasy-off-season-idp-depth-chart-outlook-%E2%80%93-afc-east/