Based on his rookie season, Brian Cushing is going to be a very good 4-3 SAM LB. He's so far been much better than what I expected, and is a leading candidate for DROY. I have to give him credit - I never saw this coming.
With that in mind, I don't see him as a god fit for the Pats. First, he's still got long term injury concerns and a question of steroid history which concerns me. Second, his strengths are in coverage and pursuit/tackling, not in taking on blockers and doing a lot of the things BB demands from his LBs. Third, I don't think he has the size to hold up as a 3-4 OLB in our system. As a 4-3 SAM, yes, but not as a 3-4 OLB.
But again, he's doing a terrific job for Houston. Give the kid credit.