To be fair, I don't think drones were ever going to work, and I'd argue that they would be counterintuitive to a proper Lagoon show. WSL is staged as a rich canvas to expand upon, not overpower.
Music is going to be the kicker here, and I think they recognize that. "Original composition" seems to be an indicator that this can't just be another "Disney Concert". In fact, I'd be surprised if this show was lyrically heavy.
I think there's an inclination to make this more of a simplistic IllumiNations-style show, amplifying the remaining infrastructure and effects around the Lagoon. So, something like culturally-inspired orchestral Disney songs while the respective country lights up is what would serve as a slam dunk, especially if the "original composition" ties it together.
Here's to hoping they ask Pinar to put in just a bit more work and deliver a score. She's really bailed them out with the acoustics of this project, especially with the new BGM she's composed.