this is looking good,
got a few questions:
1- since this is a non unity server you are building, i assume your server will not be aware of server side physics nor server side collision detection,
like the other socket servers ie: photon, smartfox etc... is this correct?
if so, are you guys planning to do something about it,
otherwise, the server will be prone to lots of cheats, ie: walking thru buildings, speedhacking etc....
2- is the backend an authoritative server?
3 -how about AoI, will your setup have an Area of interest so the server will only synch traffic to nearby players instead of whole world or scene?
otherwise the server might choke with more than 100 cc players in one scene/instance.
4- how about the server backend you havent clarify what language the server is? java, c# c++ etc...
is it windows only server? or is it multiplatform, ie: linux?
5- one last question, are you the actual lead developer or are you the spokesman for the project, since by your posts you seem to know little about the server backend, is it someone else or a third party building the server?