Emma, I feel that you have missed the point. His loss to Berdych was coupled with his return to the bad old oncourt Andy and on that basi alone, the loss was dreadful.
In order for Andy to achieve his long-term goal, he has to prove that he has the regular beating of a player of the ilk of Berdych. No excuses are acceptable. The surface is irrelevant.
I am sure from a fan's point of view the loss looks awful and the lines are so fine against a player like Berdych, who is perfectly capable of pulling an upset, makes things even more doubtful, but I am not going to take one particular loss and make a final conclusion about the whole affair/season etc. I'd like to see the big picture and see what this loss truly means for Andy. I am at home today as I'm under the weather so I got to see the match twice. One it's original time and then it came on TV at 10am. If you'd paid enough attention, you'd have seen Andy wasn't exactly thriving for a win there especially in the 3rd set.
As to his body language being back, I personally don't think that's a big deal and I don't think Lendl is too bothered by it either. Andy can definitely allow himself to be like that as this will allow him to stay calm where things will matter the most. So in other words, it's best to get it out of the system in small tournaments. Even so, it's not a big deal because a lot of the times, it allows Andy to come back in a match - a match that is more important. I wouldn't read too much into it regardless.
Finally, it would be Andy's best interest to let these guys - both Nadal and Nole - to fight it out during the clay season. Andy will have to play smart both on and off court and wait for his chance, where the opportunity will be much bigger and he will be able to capitalize it in a big way. Andy just can't afford to go into tournaments for the sake of it having no plans at all. And even if it's a bad loss, it's still not as big as it's made out to be.
And the surface is definitely relevant because Berdych, Nole, Nadal - they all have better results on this surface than Andy, so it does matter but it matters much more against Nole and Nadal, because they are the ones who are constantly getting in the way of Andy winning a Slam. Berdych has yet to stop him and the chances of meeting him in a Slam are slim, whereas Andy is almost destined to meet one of these guys - Nadal and Nole - in a Slam. It matters.