like I said Dolby really should spend more to educate some of you...
Or maybe you could do it for them since you obviously are so well educated.
And to answer your question yes Atmos really is "just overhead that mixed with the bed channels together"
As I said it offers no other benefits to anyone with 7 speakers. TrueHD was already lossless. And you don't need to be object-based to do imaging. That has been possible since stereo was invented 100 years ago.