This is it, really.
I'm disappointed that certain acts haven't made it. I'd have quite liked to have seen Air on the line-up. But it doesn't make the line-up bad or anything (I've seen this in a fair few instances, not specifically in this thread).
I don't think it's necessarily fair to critique the festival because a certain artist hasn't been booked. There are a tonne of factors involved and ultimately no one outside of a very select few really has the full picture of what's going on behind-the-scenes.