Best thing we could do for Sandro is let him play in the u23s till Xmas, take the pressure/spotlight off him, let him adapt to life in England and play under a manager who instills a loyalty, work ethic and positive attitude in his players.
All of the players who step up from the u23s apply themselves, work hard and seem to be more adaptive tactically. He himself is only young as well, and he would come back a better player for it.
Plus, we are taking Niasse from their pool of players so it's only fair, and at this point in time, Niasse offers more, whether that's the trendy opinion or not.