The more I think about this, the less I like the idea. What is a Schneiderlin upgrade going to do for us? Playing with a positionally conservative defensive midfielder forces Gana into a box-to-box role, which he plainly isn't good at.
We'd be much better served adding someone who contributes something in attack -- preferably passing -- and sticking with Gana at the base of the midfield (provided that he continues to stay in position like he did on Saturday).
I'm a definite N'Zonzi fan, I just don't see how he helps us right now.