Also, I think the mic is kind of crap int he upper octaves
The mic I use for Audyssey Pro is calibrated to my system and software, it is a step up from the mic's supplied by either Marantz or Anthem.
There was a blog post by the president of Bryston on this
He’s got a dog in the race but I know the processor they have that does Atmos uses Dirac.
Hoenstly, prior to Atmos, DD and DTS were really amazing
You nailed it on this one. The budget studios get for the blueray mix is peanuts compared to the film track. I stream MCH with an X-Box which has an amazing feature. It has a menu to select the format you want to stream in, lossless 2,5,or 7 channel, DD, DTS, and with a paid upgrade Atmos or DTS-X. If I am watching a musical from the 40’s and want to stream it in atmos, done. If I am listening to tidal stereo recordings and want to stream them in DTS, done. Live recordings sound better to me upmixed in DTS. House and pop sound better in my room in atmos. Sunday morning I like two channel stereo with my coffee, and on and on we go.