That looks really good, if only you could have Vue populate it correctly. It's a pity. The roads look very thin, I imagine that it's really difficult to keep huts off of them.

But... I was thinking, is this important? If you make all the ground with the same color (the color of the roads) and you populate trying your best to keep huts away from the roads, the spaces that remain will look like roads. The fact that you used the same color for all the ground won't be seen in the areas that are covered with huts. So, everything will look fine! Spaces between huts will look like roads and there won't be the feeling that huts are on the roads.

In fact, this is even probably what happens with these old towns. I mean, before building a hut the builders don't cover the ground with anything, they just build the hut wherever there's space. So, the ground does have the same color everywhere. The remaining space not covered with huts is the road.

I'm not sure if I was clear... Let me know if not and I'll try to explain in a different way.

Of course, the canals are a different story. Here I think the best strategy is to have a space around the canals that are not populated. I mean, the distribution map should be slightly different from the city map itself. For example, one canal can be 6 meters wide and the area that is not populated is, say, 10 meters wide. So, even if there's a bit of 'invasion' of the huts in this area surrounding the canal, it will still look ok. You can populate the remaining 4 meters with grass and this will cover any defficiency.