If he hadn't wanted regular first team football Rafa wouldn't have sold him, and rightly not. He was a useful option, unsettled many an opposition team (Milan couldn't believe their luck when Rafa didn't pick him in Athens for a start) and, after a very slow start, ended up with a far better goals-to-games ratio than his critics here and elsewhere seem to realise.
That said, this move's never going to happen. Whether Rafa wants him or not, Crouchy's no more likely to get a regular first team spot now than he was when he left, so why would he come back?