Right away, we can eliminate the Giants from contention for the NFC East title. Their team has been in complete disarray this season with no production whatsoever on offense or defense. Also, since the playoff format expanded to 12 teams in 1990, no team that has started 0-5 has gone on to make the playoffs.
Moving along, teams one through three play a whole-lot-of offense and very little defense. If any of these teams can muster together some strong defensive play, they will most likely clinch the division. Given the personnel of these three teams, the Redskins are the most talented defensively, and they are followed by Dallas and then Philadelphia. As the Eagles seem to be a secondary and a defensive coordinator away from playing solid defense (or any for that matter), I will cross them out of contention for the NFC East leaving just the Cowboys and Redskins.
What seems to be huge dividing point between Dallas and Washington is their divisional play. Last year, in Robert Griffin III's only year with the Redskins, Washington went 5-1 against NFC East opponents. In the last three seasons, Dallas has fared no better than 3-3. Five divisional games make up a huge chunk of these two teams' schedules and will be the key factor in determining the fate of the NFC East.
Prediction: Both Dallas and Washington will finish 8-8. However, the Redskins will clinch the NFC East title with a better divisional record.