I suppose it's fair to pick apart the technical aspects of a certain performance. You did pay your money.
Ballet lovers analyze dancers' performances because they love the art and want to see it thrive. They (or at least those of us here at Ballet Talk) don't see a performance as a commodity for which they've shelled out money, and what we do here is not the balletic equivalent of product reviews on Amazon. We all appreciate the fact that artists work very hard, and are grateful to them for doing so. But like all artists, they have to recognize that the people for whom they're performing have opinions about what they see, and some of these may not be to the artists' liking. Here at Ballet Talk we have certain rules for our discussions, and one of them is that posters should be aware that the dancers may read what they write and to phrase whatever negative criticism they might have tactfully. Anything rude or cruel is deleted from the board. As you say, 32tendu, we are all here because we love ballet and this is one way of supporting it. But support doesn't mean unrelieved praise.