Said all along that they lacked legs in midfield. It was glaringy obvious and the performances highlighted this. A midfielder I would have taken was Ascacibar who now plays for Stuttgart. He's a bit like Stuart McCall in style - ideally he would have won the ball back earlier allowing Messi (and others) to get on the ball earlier.
I also would have taken Martinez. Not as a starter (initially), but used as a sub instead of Higuain. Again he has legs and can press high up the park as well as having the quality.
Defensively, there weren;t that many options but they could have set the midfield up better to protect the centre backs and say we'll just rely on the quality up front to get us a goal.
IMO, Higuain, Mascherano and Di Maria shouldn't have gone - who decided that they should is the $1m question.
They need a new goalie. Interested in your opinion of the Racing goalie, Musso. He's 23 and there is talk of him going to Udinese. I think he looks a decent prospect (not De Gea standard) but you are a far better judge than me on keepers.