Secondary, followed by linebacker and offensive line.
Mostly, the Eagles could use a free safety and then either a good strong safety or corner.
Sheldon Brown is great, but he was already unhappy with his contract last season, so a great 2009 isn’t going to help that—and Joselio Hanson is not a starting NFL corner, at least not on this kind of defense.
At safety, Quintin Mikell struggled quite a bit in coverage, Quentin Demps stinks, and Macho Harris would probably be better off going back to corner.
If they draft/acquire two safeties, Demps could be jettisoned, Mikell could be rotated between spots as necessary and Harris could move back to corner (which would pave the way for a possible move of Brown) to go with Samuel, Hanson, and Ellis Hobbs.
On the linebacking front, they have eight or nine options, but not many are viable.
The Eagles used six different MIKEs this season, and while they will get Stewart Bradley back in 2010, will he be as effective as he was in 2008?
He will most likely take back over in the middle while Will Witherspoon will be on one side. Tracy White will be back somewhere, too, as he’s valuable on special teams. Beyond that, who knows?
Akeem Jordan and Chris Gocong had roller coaster seasons but have the experience. Moise Fokou looked lost at times, Joe Mays simply can’t hack it, Jeremiah Trotter is a one-down backer at best, and even Andy Reid might not be sure where Omar Gaither fits in anymore.
And as for the offensive line, they need a capable backup center. Nick Cole is a decent fill-in, but the loss of Jamaal Jackson hurt more than anyone will admit—and with a torn ACL, he may not be back for the season opener.
Cole or Mike McGlynn could be fine with full reps, but they’d need another interior lineman to compensate for them moving to center.