Your map looks nice. But I wonder if Europe regions wouldn't be too small ?
I cuted FTW3 map in a way that Europe wouldn't be too small, still beeing able to fit most of the world.
I love the time frame we could use Asia Empires and some other mods ! We would need to find people able to create units for Incans for example, as no other mods do so.
It would be better once hardcoded limits are broken, but I can imagine the factions for this time frame. One faction in my list needs to be cut off though. Feel free to suggest other factions if you got an idea.
=Americas= 5
Apachean
Cherokee or Creek or Hurons or Iroquois (would need new units)
Aztec
Maya
Inca (would need new units)
=Africa= 5
Mali
Kanem Bornu or Kongo (Needs some research, but maybe they can share units with Mali and Zimbabwe)
Zimbabwe
Egypt
Morocco
=Europe= 11
Portugal
Spain
France
HRE
England
Papal States
Denmark
Hungary-Bohemia
Poland-Lithuania
Ottoman
Russia
=Asia= 9
Mughal
Vijaganayar
Kazakh or Oirat or another nomadic faction
Persia
Ming
Japan
Korea
Siam
Majapahit or Melaka (would probably need new units). Majapahit at this time was going to disapear while Melaka continued much alive struggling against Europeans.
For Americas we could make small pox spread instead of plague