Could you break that down by province ?
Let me say it differently : is that the average for places like Jiangsu and Anhui, or does it also include remote places like Gansu or Yunnan ?
- if it's 3000 km² average in Jiangsu/Anhui, I'd say to make the larger ones their own province, combining the smaller ones by 2 or 3, and subdivide into locations around 1000 (max 1500) km², as in western Europe.
- If it's 3000 km² average in all of Ming, then it's probably less than half that in Jiangsu/Anhui, in which case you could argue that this would be a good way to define locations, even though on the larger side (splitting in two those over 2000 or 2500 km² for those areas).
Either option would result in (way) more locations than currently shown.
I don't mind leniency for less-developable region