1) UI to configure users and spaces
As you know most of the configuration options are only available via CMS API
2) Camera snapshots in conference control
The Cisco Meeting Manager tool does not provide camera snapshots. See CMM 2.6 user guide for video operators for more.
3) Monitoring and reporting tool
CMS servers provide API and CDR records but no native reporting tool is available.
4) Lecture mode with hand raising
There used to be a native lecture more for Telepresence Server conferences. Though there are guides about how to configure it with API (see https://kb.acano.com/content/9/68/en/how-do-i-set-up-%E2%80%9Clecture-mode%E2%80%9D.html) the hand raising feature is missing.
5) UI to access meeting recordings
CMS can record meetings (special license is required) but it only stores recording on a NFS. No interface to play recordings, manage access rights etc.
6) Ad-hoc meetings with automatic dial-out
Lots of clients want to start a meeting with a push of a button and have a predefined list of participants to be dialed and joined automatically.
7) Streaming Server
CMS meetings can be streamed to a predefined IP, but you have to deploy some 3rd party media streaming engine to capture it and broadcast to users.
If you feel something major is missing in this list, please give us a shout.