I think a 5th for Sproles is WAY too much for a guy who was on the verge of being cut just 24 hours before hand.
I do think he'll be a nightmare in the Kelly offense and also helps upgrade the poor eagles return game.
Honestly though I think he'll line up in the slot as much as in the backfield. Chris Polk and Brown are pretty damn solid depth at RB for Philly already and despite the very heavy workload for McCoy and the likely need to move some carries around I'm not sure it'll be to Sproles as a runner.
The Eagles Offense has added Sproles and Maclin and still has Jackson, McCoy, Cooper, Ertz Cellek and Casey. That's a lot of toys for Chip. Should be fun. They have lost Jason Avant.
I'll take Sproles over Avant in the slot every day, package plays with a Run to McCoy, bubble screen to Jackson and a short slant to Sproles and the like are already being dreamed up.
As for the releasing Casey, I think it's odd how little they used him considering he was such a major target for them last year but it may have been due to the emergence of Ertz as a rookie, and rookie TE who are good are not very common.
The Eagles are still WAY under the cap, so I'd be very surprised if Casey were cut.
The eagles appear to think they are ok at CB, despite showing interest in Revis, they now have 4 solidish corners, and Boykin is potentially more than solid.
They do still need another safety but Jenkins is a big upgrade to the poo poo platter.
The offense looks pretty stacked, depth on the line and youth is all they might need. The Defence still needs a LOT of help.
A starting safety is the glaring hole, but they need more pass rushing help, probably a nose tackle and some depth at linebacker generally.
If Wilfork is cut, the Eagles might be a very good fit. He, Fletcher Cox and Thornton will be very tough vs the run, and switching curry for Thornton for passing situations helps there too. That would be a very interesting DL