I just want the CoH version of Project99 for Everquest classic/Kunark/Velious, Feenix's Emerald Dreams for WoW vanilla, or Utgarde for DAoC.
You can call it whatever you like, just make my client talk to something that lets me superjump through all the familar places, chat with friends in-game per usual, group for missions and TFs, and beat the whatever-serves-for-snot out of Rikti in the RWZ.
If the exact physics or other calc done server-side aren't exactly the numbers that would have been sent back from a real PS server, that is expected and can improve over time. I think everyone realizes that you have to invent your own equivalent to what they had in terms of data persistant storage and in-memory schema, calc logic and scene update messaging. Oh, and whatever behavioral script system you are using server-side (LUA-based would be my guess).