Thinking BIG - 600 miles

[Avulsion]

This is a close approximation of the scale involved.

It took the early pioneers a year to cross the United States using wagons. That's about 4 of our regions wide. There are so many thousands of cities in the USA, and I'm sure medieval times had many fewer towns, but all the same, we need to seriously reconsider the scale we're using.

I suggest the scale is halved or quartered. This will make the planet smaller, but judging by the maps I've looked at, the regions would fit better with a 300 or 150 mile width/length.

Just my 2 cents.