I don't believe it's a matter of MLB not approving the deal at this point.  That was supposed to occur at the owners meetings on 3/12-3/13.  The Padres have been saying all along that they want the games broadcasted to a larger portion of the market under the new agreement.  They probably do not want to announce that their new $1 Billion deal will only include DirecTV and Cox.

FSSD showed Saturday's game and I'm sure they would continue to do so for as long as necessary, so it's doubtful that we would only get Nationally televised games.