I just got around to watching the Blu ray of this today and it is superb. Some of the best photography or cinematography you can get for blu right now, and easily goes straight to the first shelf for demo material. As for the scenes from Burning Man, I would have preferred more of them, not less. I would have traded a few scenes of some of the trees silhouetted against the night sky for some more partiers, if only to add more variety in subject matter. I am sure there is a lot of interesting visual subjects at Burning Man.
As for the sound, the music encoding is fine. Seriously, who cares when you could never tell the difference between this high quality of compression or lossless? Yeah I would prefer lossless, but I don't feel ripped off. The soundtrack was nice, but it didn't have a tremendously dynamic range so it doesn't matter. Btw, BD50s are more expensive, and I am sure they are trying to cut costs wherever they can. This isn't a huge release, and they will need as many sales as they can get, so they have to keep costs down. How many people are going to spend more than $20 for a 40 min feature? For anyone who cares about timelapse done right, this disc is the best thing since Baraka, and we have Samsarra just around the corner too, that will be a real treat.