the defense certainly wasn't world beating last year, but here is a little fun fact, they were seventh in points allowed -- ultimately the most important defensive stat. And that was with tons of injuries. The defense certainly did its job in the championship, it was the offense that faltered.
Signing kearnse and dhani jones should help, not to mention guys coming back from injury, having dawkins for a full season, and the corners having a little more seasoning.
D is not the problem with this team, neither is QB or RB. WR is next on the list and the eagles have the dough to fix it.