You could fit either in player in easily. Ben Arfa works hard, he just loses the ball more than most because he takes risks. It can be annoying when that happens, but then I find it refreshing that we have a player who isn't afraid to take players on, no matter who the player is. And hell, it works out for Ben Arfa more than most.
Anita is probably the best passer of the ball we have, he's perfect for the midfield as well imo, and the second we start going to shit he should immediately get a starting place in the team. The only reason he hasn't in the last few games is because we've been winning, but if we lose again this weekend then there's no excuse.