Not sure about this ... we either keep him on the wing and he plays like he is now, losing his pace, and we end up sacrificing a position we could buy younger in in the hope he somehow re-finds his younger self.
Move him inside, and try and make it work, sacrificing a position where we have players already.
He becomes a 'Ronaldo', moaning at being left out if he doesn't start every week, generally being a sulk and causing discontent for a new manager and being a massive burden.