I would really want to see him developing at Real Madrid actually. Because I believe that he is really not a bad player. He still has a potential in himself. And he is still very young. And I mustn't overlook that he is a quite valuable player also. If I was Ancelotti, I would definitely give him chances. But I respect his calls of course. He is one of the best managers in the end. 
I guess he knows what he is doing.
Odegaard is a potential player, He is still young and many have a chance to develop his skill, but Ancelotti saying for his position filled 8 players and possibly nothing him to sit for confidence. Arsenal is good for him, but I know he has to chance to find a better club, he only creates 2 goals and assists with 20 competitions, which is not good for him. If Odegaard has the option, he must move away to a better club. I guess he knows what he is doing.