Pretty self explanatory.
This "reprieve" for Mangala would be nothing more than being unable to move him on.
We could get rid of him if we wanted. Latest reports said we wanted £18m and weren't budging, not to mention we could definitely find a loan for him off the back of his Valencia season.
Nasri and Denayer are players we can't get rid of, and they are training away from the rest of the team according to these reports saying Mangala is staying.
So, no, I don't see how we're keeping him as a first team player because we can't get rid of him, it's because we haven't found someone else to come in.