this was not my experience, a few earlier tracks didn't have much or anything going on in the Heights but the majority of them did, sometimes percussion, sometimes vocals, sometimes guitars, sometimes strings, "Beautiful Noise" started out with some of the traffic noise in the Heights and on one track Neil was up above in a kind of reverby "voice of God" way.
really impressed with how much they squeezed out of what are possibly fairly limited original multitracks.
my only wish was that they had Atmos mixed the duet version with Barbra Streisand of "You Don't Bring Me Flowers" rather than the solo rendition and any tracks from the "Serenade" album and maybe one or two later tracks they didn't cover but really a lovely surprise