There are some glaring blank spaces in the current map of Asia that are just begging to be filled in as well as many inconsistencies that should be fixed. Something similar to the map below would remedy many of the issues and fill in gaps like southern China, Siam, Philippines, and Moluccas.
Here’s an example of what one of these new maps could look like:
Settlements - Shaolin
Fauna - Deer and Serow on land and Giant Salamanders in the river
Features - Sheer mountains run along the course of the river providing shelter in the valleys. The inspiration for this map was the Wuyi Mountains shown below:
Similar geography can be found elsewhere in China, so this could also work as a map for the Sichuan region.
There are many gaps between regions as mentioned above. Thes can be seen in the current layout:
The Asia map is inconsistent compared to the map of the Americas. The Americas are done in the style of the maps of the period with all the inaccuracy that comes with. This makes the accurate and modern Asia map look very out of place by comparison.
My proposed layout is based off the 1799 map by Laurie and Whittle pictured below which is mostly accurate but still rough enough to fit with the style of the Americas map.
There are also errors in the modern map due to changes in geography since the game’s time period. For example, for the vast majority of the game’s time period, the Yellow River flowed south of the Shandong Peninsula, yet it is depicted in the modern location.
Poor placement of minor factions. Sufi in Mongolia and Zen in Ceylon are too much of a stretch. Adding more maps could allow more minor factions than just religious orders to occupy the map. Factions like Ainu, Afghans, Malay, Mongols, Tamils, and more could fill out many of the maps and provide more variety.