@normandc perhaps you’re getting DE’s confused with Distros? Manjaro w/ Phosh is actually very usable! Far more than I expected. The Beta 6 is rather impressive. Most of the issues you mentioned have been solved in this one. Autorotate; Voice Quality, Auto brightness etc.
Mobian /w Phosh feels more stable, but is definitely lagging behind on a fair few issues.
I’ll also freely admit that the keyboard isn’t the greatest, but it functions well enough.
Perhaps try the Manjaro Phosh Beta, it might be a better comparison, feature for feature. 😁👍