The first track was also released as a single a few days before the album, not sure if that's affected too.
I made a post over in The Marvels thread about Voices of Aladna disappearing a while ago, glad to see I wasn't the only one who cared about it! Also saw a tweet about Voices of Aladna about a month ago saying she'd look into it, guessing that hasn't gone anywhere. I think it might have something to do with the lyrics/poetry her niece did for those cues, but totally just speculating.
Regarding What If S2... I'm hoping this is a sampler album of sorts, rather than the only thing we get. Really wanted to hear the Kahhori material outside of the episode.