I suppose Pedro has been brought up to play the possession football that Van Gaal requires to execute his philosophy. Di Maria showed no progress in that regard last season. IIRC in his last game of the season he was still trying the hardest thing almost every time he go the ball. Di Maria is a Fergie player unfortunately. I really like him as a player, he reminds me of Giggs but Van Gaal wants a player who looks after the ball and considers when to play the finishing ball better. I don't think he will ever play him in the centre for a stretch ever again.
Great post. I think you may have hit the nail on the head there, certainly makes a lot of sense.