Agree mostly with op except point 3, the clutching at the back etc. He said his lycra shorts were a bit tight.
He has had stiffness in his back all week but has consistently said it is just uncomfortable more then anything and not really affecting his play.
No, I think the main thing is Andy has shown good progress and maybe just needs to play consistently more aggressive tennis even when he doesn't need to so that he is in the groove when the big matches come along. Maybe if he could close out matches more quickly, there would be less of a physical toll, although obviously things worked out pretty well for him in Australia anyway, probably because of the type of players he faced (except Cilic who was just tired). Forehand looked better today, I thought, but more work needed obviously. First serve percentage/consistency and second serve are other obvious areas.
In his interview, Fed said he played some of his best ever tennis and who am I to disagree so things aren't all bad.