I am not much of a programmer so I have no idea if this is possible to do in the game engine or not.
I was just thinking how a feature to randomize the overmaps would be nice. If you travel you can go through sparsely populated forest regions to happen upon a city area.
A setting to randomize the starting area or have that specific and another to randomize other overmaps that spawn around you. Probably best to be able to set min and max values for spacing, city size and such. Say like if you want to do a forrest start but still be able to find a city out there somewhere if you traveled far enough.
Just a thought…