I don’t think anything specific was advertised, it was open to a wide range of interpretations. Maybe based on the spoilers that featured musicians, and the fact that it was typically advertised alongside The Little Mermaid, I was expecting a full musical a la The Little Mermaid. I also think people were really hoping for a sneak peek at the direction of Villain’s land.
That said, I think it’s very well done for what it is. If I’m comparing this to something more like Philharmagic, then yes, it’s really well done, visually stunning, a compact, ride length show that’s a great time.
When I saw the first leak of Cruella without the screens prominently featured it was actually really confusing - it wasn’t until I saw the screens in full that the show made any kind of sense. And I think that kinda summarizes it - this is really an immersive film experience enhanced by a few live actors. Which is, again, very very well done for what it is, but I just wasn’t expecting a mini movie, I was thinking more live musical.