Okay, trying to help here.
First: Standing only. With the obvious exception of the elderly or those with special needs due to physical issues, this really is not a huge deal. Honest. I don't know if you have ever watched the fireworks or Fantasmic! at
Disneyland, but probably 95% of all viewing for fireworks is standing only. At Fantasmic!, with the exception of the seating area and the "dessert premium package area" everything else is standing room only.
I don't know how long the show is, but it really isn't that different from any of the other evening entertainment.
As for a long line at Guest Services, I hope it's with comments about how amazing the new show was!
Lastly, I think Disney has done new shows and evening entertainment a "few" times between all the different Parks. They tend to have an idea of how to do this and put a LOT of work and thought into making it flow well. I think they plan out logistics to the Nth degree in more detail than anyone would ever want to think about. JMO
- Dreams