Playing in front of Paston wouldn't exactly instill me with confidence. The players must know that he's not gonna dive for anything, can't be a great feeling for the defenders. For me, Moss needs to be in. Paston is past it (pardon the pun)
Not sure if you were watching the game last night, but Paston dived and made a good effort to save six of the seven goals, and the one goal he didn't dive for (ADP's 4th) was because the ball was 3m away from him through the entire flight of the ball into the top corner. None of the goals were his fault, in fact Sydney could have had more if Paston didn't pull off those good saves.