I have each side has to relealize what they are getting and what the other team is giving up. Shady is a team Captain who is helping Allen get acclimated. He’s not just an aging RB. The Eagles should appreciate this team dynamic, irrespective to what they hope to receive from Shady.
As as for any signal that the Bills “gave up” on the season, the players should realize that a team is not an individual. We have other decent RBs. That said, to help ease any perceived pain, they should send us a player back that we need. It will then be seen as addressing a need, rather than jettisoning our best RB.