Since P2P streaming can be a bit difficult to deal with for some people, a way to use the server for distributing your stream. This could help situations where not everyone in a call have good connections, and for big crowds.
Generally, a feature (not sure if its there already) to require all voice and video to go through the server only. This would be nice for anyone who’s somewhat publicly exposed, like streamer personalities and all that. I think most people would want to hide behind the server ip to be honest. This should of course be a configurable feature of the individual server, in case there is not enough bandwidth to do the job.