I would swap Rabiot and Pogba. He seems like a player they would take because he would fill the same role as Pogba and contributes a little more defensively. Chowder seems like a good dumping ground for players, maybe they would take Berna too.
Well Khedira is on his way to Everton so I guess it boosts our chances.
Rabiot is actually the best midfielder we can include in a swap. In terms of ability he is good but he just doesnt fit our current idea of football.