https://music.oricon.co.jp/php/cd/CdTop.php?cd=SPB00191227
Samples are up. In fact, it looks like you can purchase and download the entire soundtrack from that site (which I haven't done). So far, I'm really underwhelmed. It's less substantial than both the last Mahouka movie and the BSD TV series. No real substantial pieces at all in any genre. Just meandering background electronica and a handful of piano pieces. The only interesting bit seems to be another opera piece, but those are a dime a dozen nowadays for Iwasaki. I'm actually shocked at how much of this sounds like filler music. And I had high expectations too.
Still, my opinion might change once I can hear the whole thing. 21 pieces is rather short for a film soundtrack, even shorter than Mahouka. Maybe there's more music once you get past those 30 second samples.
Up on iTunes as well:
https://itunes.apple.com/jp/album/1349116876?app=itunes