Please, shut up.  If you know your rock shit, you'll know Mick is the first one that ever danced in such a way that was wholly new. Not like Elvis, I mean in a erotic/feline-like way to create a very special link between crowd and performer; however that effect is lost these days.  The Stones still fucking rock though...
Although I think we can all agree that it is due time for Keith Richards to die.  He looked like a walking corpse (much worse that Jagger) and barely like he was playing his axe.  He didn't do any of the solos either.
As for the sound. I'll agree that the acoustics weren't very impressive and I was expecting something like "You can't always get what you want" with tons of choirs exploding everyhwere at the end à la Hey Jude last year. But what I think happened is that they actually performed; and the acoustics on that big a stadium are never going to be that good, but you get ragged on when you use dubbing (not full lip-sync).  For instance, last year, McCartney was singing but there was probably also a pre-recorded track layed over, because it sounded too good for the acoustics of the place, and consequently it put on a much better show.