Below is my compilation of maps that I believe should be added to the game. This fills out the missing regions of the map and presents them in an aesthetically pleasing way that could be easier to navigate than the selection menu in game. My aim was to fix the many inaccuracies of the current loading screen maps and strike a balance of being reasonably accurate but not perfect, and still having some unexplored regions that the “Unknown” maps can fit into. Regions that do not yet have maps could simply be covered by the unknown regions until they are ready to be added. This style would also lend itself well to a world conquest game mode as you could see the world as you conquer.
Some name changes are to fix excessively generic names (Central Asia, Parallel Rivers, etc), some are to better reflect map locations (New England containing Plymouth), and some are to make the names more concise so they actually fit on the big map (the European have a lot of very long names for very small territories).
Savanna → Volta (Savanna name reused in southern Africa)
Highlands → Ethiopian Highlands (to differentiate from Armenian Highlands)
Dnieper Basin → Wild Fields
Vistula Basin → Poland
Hungarian Plains → Pannonia
Eurasian Steppe → Steppe
Karelian Lakes → Karelia
Balkan Mountains → Balkans
Acropolis → Hellas
Wallachia → Danubia
Black Forest → Removed from Europe (a more densely forested area like the Amazon, Congo, or Taiga would be a better fit for a map like this)
Below is the list of all I think I should be added. I tried to make everything fit nicely in this form, so I don’t think trying to cram any more into Europe is a good idea, but there are probably a few more that could be slotted in or renamed, especially with the mess that is the current maps of South America. I’ve already done a few mini-map designs, and I have some ideas for lots of these in the list so I might post them as I make them. Hopefully there’s still someone who can add new maps with Vividly gone from development.