I haven't watched this or Harmonious because I don't really care much about the night time shows, with the exception of Illuminations which was tremendously good. I probably won't see them until I'm actually in the parks again, whenever that is. Happily Ever After was fine (my GF absolutely loved it and was very sad it was replaced), but it didn't really resonate with me. I've still never even seen Fantasmic or any of the other fireworks shows they've done at DHS.
I'm prefacing with that to show that I'm far from a connoisseur of night time fireworks shows. With that said, I wonder if part of the problem people have with the new shows (at least for some people) is the heavy focus on recent IP. People tend to have stronger connections to music from movies they watched as a kid, so for older fans (really anyone older than 25-30, which is a lot of people here) these soundtracks are less likely to resonate than the exact same show full of songs from 25+ years ago. Just throwing that out there as something to consider.
I really don't get re-recording most of the songs, though. They almost invariably sound worse than the original versions. I also don't really understand doing a new show for the 50th Anniversary that's just about Disney movies instead of the theme parks it's supposed to be celebrating.
Harmonious is a completely separate thing because that kind of IP show has no business in EPCOT, especially with the awful infrastructure.