I personally think that city/village maps do not need contour lines because... well, it's just an uncommon combination - it's hard to find a settlement map with contours. But also there are some issues:
- In MFCG there is no elevation data to build contour lines. I can generate that data separately and draw the contours under the rest of the map. This would work with maps without water I guess, but not when there is a river or a coast. It is possible of course to generate elevation data "compatible" with existing water bodies, but it's more complicated.
- In Village Generator there is already elevation data it's visualized using hachures. I can use that data to draw contours, but honestly I just think hachures are a better match for "cartoonish" style of this generator. Actually, I tried to draw "imperfect" contours there. Maybe I'll try to do it properly to check how it looks.