There were songs that used surround more to a dramatic effect, creating ambience with it and impactful moments kicking instruments into full gear in the surround channels. The build near the end of 'Goodbye' a good example.
That was a surprising moment for me because it happened after a number of songs in which it looked as if he had almost forgotten he was supposed to be mixing in Atmos. It's easily seen on the picture @LTW posted, how suddenly the other channels become a lot more active towards the end of the song. It's one of the "absolutely huge and immersive" instances I was referring to in my long post.
Disappointed to read about the lack of smooth transition between tracks on the blu-ray. It flows nicely on Apple Music.