He will probably blow a tire soon after he joins the team. That has been his history. He never wanted to leave the Mets, so this could rejuvenate him.
As for the wife beating, we have seen a long history of different rules applying to athletes. Society is willing to sweep it under the carpet when professional athletes are involved. As a baseball move, it looks like a good move for the Mets. Plus, it fits the cheap assed Mets budget as they will only pay him the league minimum.