We obviously need defensive line help. I think that goes without saying. We struggled with both our interior and exterior pass rushing against Dallas and if that continues against Buffalo then we could have a problem on our hands.
Honestly though, I'm VERY concerned about our secondary. Other than maybe Ronde and Aqib, the secondary looked horrendous. Sabby in particular. We need some help big time.
Regarding Sears, we have Zuttah who is playing well so I don't think his situation is a dire problem.