Depending who the Pats get they could be improving too. Right now I think they're marginally worse because they downgraded from Welker to Amendola, but I think they're still a 12-4 team. All they need is to resign Talib and pick up another player or two on defense and they're ahead of where they were 3 months ago.
But yeah, Ravens lost everyone and the Texans aren't making any moves. AFC is a dead conference.