Since it's a small number of POIs that are affected.
Would it be possible to add a code insert that pulls from a file so that players can customize it if they want.
The file being a limited count of poi names, and a count of 1- whatever the dev chooses.
Have it preclude running, rwgmixer.xml sort of an over-ride, or insert so that rwg may remain the same.
By default have the missing 100 x 100 pois by name and quantity of 1. By default the traders quantity 1.
Then have the world build around them.
Similar to how the topological decor like boulders and stumps etc, are overlayed after, the main objects have
been rendered.
If it could be done then as long as the biome is present, no matter how small traders would spawn, because
they are given over-ride priority.
Each of the 100 x 100 pois that have been missing, would spawn at least one on the map also. Then let rwg do
the filler as usual.
Just looking at the loading screen prompts, it follows a specific order, just add a class inserted prior to other
pois being rendered.