To rotate and play games against Frosinone or whoever he's fine to make up the numbers and give better players a rest. For a much reduced salary I don't really care if he stays, whatever. Saves us time scouting somebody new.
At least it's kinda funny watching him sometimes.
The real issue is that making decisions on squad for next year implies that Allegri will stay. If we're getting somebody new, let's not labour him unnecessarily with semi-footballers like this guy.