The Eagle's side of that argument centers on three areas:
1) Rushing game. If the Eagles get a consistent rushing game, they could be scary. Westbrook may or may not have much left in the tank. McCoy isn't at Westbrook's level and I'm not convinced he's a 25 - 30 carry guy.
2) Linebackers. I realize that injuries palyed a role here with Philly last year, but, imho, it's an obvious weakness in their D. Bringing back Trotter was a move that smacked of desperation.
3) Leadership. Dawkin's departure left a real gap in that area. When it came to crunch time late in the season, the Eagles just didn't have the leadership in that locker room.