GhostofCain
Ancient Mariner
Obviously there will be songs that you and many other would prefer to be in the setlist, but keeping it the same means that everyone gets the same show and they don't have to rehearse a new song, add any new theatrics and reprogram the lights. If they replace a song then the show won't be the same will it?
Every punter gets to see the same show regardless of which one thay attend. As far as I am concerned, that is the way to go.
People tend to go on about Metallica changing their setlists. Guess what? My brother got The Memory Remains (whst a turd) instead of Creeping Death when he went to see them and was not best pleased (understandably! ).