It does seems that if M wants to market the 861 as the end all HT processor, they will need to adapt, as Atmos is here to stay. Seems easy enough to add more audio output channels, but the processing side is a really issue.

Primary: MD600, MS200 (SpeakerLink to AES), Trinnov ST-2, Ayre V6-xe, Salk SS8 3x LRC.
Secondary: MC600 (whole house).
Zone one: 568.2, G57, MS200, Spatial Hologram M2SE.
Zone 2-6 (Awaiting assignment).