In my case we just need one endpoint to get a full banlist (with pagination?) to see which users are currently banned on our chat.
Use cases:
- Checking which mod has created the ban/timeout (if user contacts our mod team)
- If I have the timestamp, I can easily show the last messages of the user (via our own chat history) to check if the ban was correct or a just mistake
- And for sure it would be a nice to have if we can take a look at all active channel bans (for example: creating stats)
Result: Making the life for our mod team easier 
Regards
Alexander