One thing I found when I mapped the original RTW, was that empires only expand in a concentric way from their capital. This seemed to be tied to their capital city size. So as the capital gets bigger, they expand further from home. It will be interesting to see if you end up with 'dead' areas were nations do not expand into.

Thank you very much to spend your time writing suggestions to me! Yes, more nations will be needed that's why I wrote that it is planned. But I can't add them in this mod, because in that way the compatibility of this mod would be drastically reduced. Right now you can use it with any kind of units mods. With new factions, it would be incompatible.