Not even close.
He's in the side because he's big and strong and that's what Pardew wants - it suits his style.
Sissoko is big a strong and it works well in the team, and like I said he has an understanding with Debuchy. Don't get me wrong I'm disappointed that Ben Arfa has been dropped as he is our best player, but I think Sissoko should be starting as over the last half dozen games he's been playing well. We have scored quite a few goals this season where Debuchy has played in Sissoko, who then shrugs off a player, to cut the ball back up in the box, for someone like Cabaye to score.