I don't really mind the "canned' orchestra, as this is a "rock opera" and thus lends itself to being more synthesized (much like many of Lloyd Webber's shows).
What I really minded was:
1. Orange crocks and Mariamba music "King Herrod's Song". The only time that my sister and I didn't clap after a song EVER! It was that much a travesty to us!
and
2. The guy playing Judas sang like he had just come off the "American Idols" auditions reject bus, over belting, over wailing, stretching out notes until you thought he would miss the next note.
And I was wondering if Ted Neeley's high notes ("Whyyyyyyyy should I Diiieeeeeeeeee") were not pre-recorded (a la Julie Andrew's high notes in "Victor/Victoria")? With his voice being in the state that it was, I don't really think he would be able to reach those notes without shredding his vocal cords.
Xanadu! Can't cry on cue!