Else youre management are doing a great job overall. The idea of selling the star players needs to stop though as you cant rebuild every year if you have ambitions winning the CL. Keep the star players you have (reject selling Pogba, Sandro and so on), then add with good players here and there. It was the key for us winning the treble in 2013, you simply need to hold on to youre best players.
As much as i dislike Uli he is a strong man in that sense, if he wants a player to stay, then there is no chance for him to leave. Just my two cents about it