first off, the rivalries.
Second, in the NFC East vs. NFC South games,
Dallas went 2-2 (wins vs. Carolina, vs. Tampa, losses vs. New Orleans, vs. Atlanta)
Washington went 2-2 (wins vs. Tampa, New Orleans, losses vs. Atlanta, Carolina)
New York went 3-1 (loss vs. Atlanta)
Philly went 1-3 (win vs. Tampa).
So I'm not really sure that the NFC East is better than the NFC South. It's probably just that we're all equally mediocre that it comes down to the last week.