As far as I can tell, everything in this has already been released as public add-ons.
The eventing was requested recently in suggestions and requests.
The server host separtor add-on was made private, and the extra values on the players list have never even been suggested, much less made.
If anyone has any origional ideas they'd like to see in a client add-on, let me know.
For now I'll be doing testing and adding ideas as I get them.