The Eagles expended resources, but did so unwisely. It doesn't matter how many top picks Roseman wasted or how many expensive, aged, injury-prone former star receivers he signed as FAs, the Eagles have not had a competent WR corps since the SB season. They tried mightily to fill the void with TE, which is why up until this season they could be so effective in the red zone, but they were unable to stretch the field and defenses were able to play uncomfortably close to the line of scrimmage. I don't know what the deal with Ertz was this past season. How does a star TE fall off the cliff that instantly?
The Eagles can't possibly fix both the O and D this year. They have too many cap problems. I choose to focus on the O because, Wentz or Hurts, they are unlikely to resuscitate/develop without a better supporting cast. Even in the games when the O-line did well, the receivers failed too often to achieve separation and when they did, too often they failed to catch those throws which were catchable. I think we badly need another primo offensive lineman to develop/play from day 1. I'm not sure how well Brooks comes back from the Achilles. Not sure if this is the year Kelce decides to retire -- certainly if the draft emphasis goes to D, that is another urge toward retirement. Not sure Dillard is strong enough to be good as our LT (I'd develop him as our next center. He has the quickness for it.) Really, not even sure how well Lane Johnson comes back from injury. It's fine to say that if Johnson and Brooks come back as their former selves and Kelce comes back and continues to play like a younger guy than he is, that we will be very strong on the right side of line. How realistic is that.
On O we know that Pederson will dictate the approach and steer the personnel. On D, we have a new coordinator and linebacker coach. Not the worst thing in world for them to take a season to see what we've got and try to develop some 4th round and later draft picks.
However you slice it, the Eagles are going to be no better than a .500 team in 2021. Bad drafts and borrowing against future year cap space have come home to roost.