It can't be
too good if you haven't watched/listened to it in a long time
Well, not exactly that.
I said "some" time, not "long" time. It could be something like two monts ago, or so. There are so many things to listen...
I liked it because of the group music and because of the theatrical performance.
I think the Atmos mix is not the main thing to look for in this release. More important, as you say, is the kind of music and the group style. Prog / Neo-Prog. And also relevant, as I say, the kind of theatrical performance.
OMG, I will have to watch it again and will have to pay attention to the Atmos mix track
Edited: Now I remember that last time I watched it I made the purpose of studying the lyrics, to learn about the story, before watching it again. Its difficult to understand and follow the sense for a non native english. ( I have not done it yet...

)