Learning the depth of your team for each position is defintely the silver lining when it comes to injuries. I posted this in an another thread but the Redskins were the 10th oldest team at the start of the season:
2011 NFL team age ranks at 53-man cuts - NFC West Blog - ESPN
I think 2 years ago we were the oldest. At the end of the day i dont really think it matters how old your team is because there are guys like Fletcher or Daniels who continue to play at a high level into the golden years. Old "vets" also seem to help younger players learn the nfl ropes. That said, i do think its important to have a good mix of young guys on the team that can take over when a player retires/gets cut.
We do have a lot of unproven (usually younger) guys and hopefully they will step up and take advantage of an opportunity whether its from injury like Cook at center or from poor play like Beck at QB. My biggest concern is on the defensive side of the ball, hopefully players will just get better in their positions as time goes on. And WR should have a lot of good battles.
Oh yeah, Hightower is definitely going to be here next year.