Dolby Atmos is a feature that is coming, so why are you disappointed that it is not released yet? Better to get it right than get it soon. Intercom is a new feature, not fully rolled out yet. But it does work between HomePods.Me too. Disappointed by lack of Dolby Atmos on the release note.
Hopefully, 14.1 also fixes HomePod occasionally "Not Responding" in HomeKit and requiring a restart and/or reset.
I wonder if intercom feature can be triggered from other devices like iPhone, or whether that would require iOS 14.1.