1. Are you concerned with them extending or closing earlier? If they extend, I doubt that anything will be done for your tix. (But I wouldn't worry about that.) If they end up shutting down earlier (also unlikely) then yes, you would get a refund.
2. The audience will be insane; curtain calls may take longer -- you might expect that LuPone might talk at the end.
If we're not having fun, then why are we doing it?
These are DISCUSSION boards, not mutual admiration boards. Discussion only occurs when we are willing to hear what others are thinking, regardless of whether it is alignment to our own thoughts.