Must be a difference of opinion then, I've seen Man Utd pay big money for him too on saves in the past. More times than not M'Vila would be better. But then again anything can happen, a season long injury could ruin a player in some saves
Capoue is amazing. Plays for Toulouse like Sissoko, has the same potential but is a lot less expensive + he can be a back-up for the DC position as well. He is a bit more defensive minded than Sissoko but you need a BWM after all.