So that's a reason not to go is it? Because it's not as good as last year? That's just stupid - it's a decent line-up and it'll keep me more than occupied through the day, that's all that matters. Sure there are some bands in the line-up that I'm indifferent to, but there's nothing that's going to take away from the fun of the day.
And you're full of shit if you believe that festival crowds aren't appreciative. Go to a single band concert and you'll get thousands of people who aren't there for the music (the Blink concert a while back comes to mind), but nobody pays $100 for a festival just to stand around. People actually want to be there, and want to listen to the music and jump around and have fun.