Pittsburgh was 8-8 last year, and I'm not sure there's much reason to believe they'll be much better next year. Even losing Ray Lewis and Ed Reed, I'd be shocked if the the Ravens didn't finish ahead of the Steelers, but the Bengals may well take the division.
Miami will be better but I don't see them cracking into double-digit wins. That's the only team that will be remotely competitive in the AFC East, but they should be decent.
And Kansas City as a wild card? The same Chiefs that went 2-14 last year? The same Chiefs that gave up twice as many points as they scored? They'll be better only because they can't get much worse... but they ain't sniffin' no playoffs. Jim Mora should be coaching those guys... "I just hope we can win a game." I wouldn't put down more than $5 on that, and then only if I got like 500-1 odds!