Coaching - better, a lot better.
Special Teams - Same or better (Crossman retained)
Running back - better (McCoy)
Wide receiver - better (Harvin)
Tight End - better (Clay)
Guard - better (Incognito/draft pick)
QB - I think whoever wins the starting job will be better than Kyle Orton was.
Defense - better. If the Jets can finish 4th overall last year, the Bills can finish 1st in 2015 with the talent they have to work with.
On paper, the Bills are a much better team but wiill that translate in to their first playoff appearance since 1999?
Biggest question marks?
QB, offensive line, and depth at tight end and running back.
If Clay or McCoy get injured, those are some huge holes to fill.