The song is out though, just answerin' your question. Usually people go to shows FOR the crowd interaction and the SHOW itself, not to hear the songs played back exactly how they are on the record.
Oddly enough I like going to live shows for both. The band can still sing all the parts and still have crowd interaction.
And yes, live shows are kind of about live music. That includes singing. So yes. I do go to hear the band play. Whether it is like the record or an alternate version is not relevant.
Either way, I pay to hear the band play and sing. I could not care less about what the rest of the crowd says/sings during a show.
Edit: also it has been out for only 48 hours.