I agree, he does look overweight and clearly has stopped giving a toss, but Pardew has been responsible for a lot of that. Ben Arfa got sidelined at a crucial time when players were playing for their world cup places when it should have been extra motivation to play out of his skin. That's not to excuse him, but with some players who are known to be difficult personalities it takes a good manager to be able to handle it. Players like Cantona and Bellamy for example were too much for the s*** managers, but were handled beautifully by the legends of the game.
I'm not sure you know what overweight means.