Hmm... interesting idea!!
I think you mean "the number of villages is greater than cities which are greater than countries", right? (:
The next thing I wanted to add after finishing up the rivers is roads- but maybe after I do add roads I could try to add more cities and change their appearance too. Perhaps the size of the country or prevalence of a city would affect its size?
The idea with the current system is that black points are "capitals" or central hubs, while grey points can be villages or important spots- but I definitely don't mind expanding on that with future settings and additions, like you suggestion above (: I'll have to make sure it doesn't make the map look way too crowded though, haha
If you want to be notified when I update this project you can follow me on Itch, regularly check / back me on the Patreon, or alternatively I could just let you know with a reply to your comment if and when this feature is added (Though I'd love to try to add it as soon as I'm done with rivers, roads and routes!)
Cheers and thanks for the suggestion!!