First my take.
NFC East: Largely left alone. Dallas still looks a little weird in there, but I guess they league thought moving it would be too drastic. Pretty good.
NFC South: I like this one…four teams capable of both great and horrible things. Should be a hotly-contested division every year.
NFC North: The old NFC Central minus out-of-place Tampa Bay. I agree with everyone who said that they could never break these teams up. Easy call.
NFC West: Lessee…two perennial underachievers, a faded champion that got hammered last season, and a one-season wonder. Plus St. Louis is kinda out of place. Hmm. Well, they had to go somewhere.
AFC East: Another easy call. Indianapolis catches a break by escaping the conference’s killer division.
AFC South: I have a feeling that Tennessee is going to dominate this division, at least in the short run. Geographically, there are no problems (at least they’re in adjacent time zones), but this could quickly become the league’s least interesting division.
AFC North: Geographically - not bad. Baltimore in same division as two doormats and one near-doormat - bad. (Well, they had to go somewhere…)
AFC West: Okay choices. Again, the big rivalries (Denver’s in particular) seemed to be the motivating factor. Personally, I’d prefer that San Diego and Oakland be in the same division as Seattle and Phoenix, but I guess this is the next best thing.
Overall, I think the league did a good job. There are still some discrepancies, but much less blatant than the old ones, like Arizona in the NFC East. I’m not too concerned about one team dominating any of the divisions either. Remember, it’s mostly cyclical. In time, all the divisions can be competitive.