Very Good map !
I would also like to see a way to add newer features to the map making
Of course I am aware that priority must take place to more important issues, so this is just a wish list.
Size down rivers or introduce tributary branch off a river (small wooden bridges only for these)
Irrigation canals
Marsh draw tool in my opinion should start small say : 50 x 50 meters and add it were its needed (like trees draw tool)
marsh is also found along river banks (this cannot be added presently)
Sunken roads
Size down farms as it is in the editor right now a farm is as big as a village.
Trees thickness versus size . Now draw program creates thickets rather then tall and wide pines.
Grass wild grasses tall as well as corn stalks.
Rocky ground
Buildings with floors and windows you can shoot out of (see Combat Mission ) Historical Period buildings
Elevation tool (2D) with numerical gradient
Cheers