With this being year number two under Greg Roman, plus Tyrod having a full offseason of reps as starter vice splitting as he had to with Cassel and Manuel a year ago, I expect the offense to do better.
Also, with Rex running his defensive scheme, bringing in his brother and Ed Reed to teach the defense, as well as letting go of players that didn't want to play for Rex [Mariocre], I think the defense will be improved from its 19th ranking last season. I see Zach Brown being an upgrade over Nigel Benjamin and Lorenzo Alexander appears to be an upgrade over Manny Lawson.
Big key to the season is staying healthy. If key players stay healthy, then the Bills have a legitimate chance at a Wild Card spot. If injuries start piling up again, then expect the same as last season, an 8-8 or 9-7 finish, missing the playoffs.