I would do it for a couple that i can think of. One, his production on the field is not up to par with what this offense needs, and his name makes a bigger splash than any of his game play. You might be able to trade him for a third or second round pick.
Second, he's leaving next year, no matter what anybody thinks, he will not be here. If he does poorly this year, Marv will be the one who makes the plane ticket reservations out of Buffalo. If he does well, Drew Rosenhaus will make the plane reservations. Trade, and get what value you can for him. Simple and done.