Would love to be able to select ocean-side, the number of roads leading in, how much of the city is beyond the walls, and toggle castle or change the number of them. Maybe you could also add some other custom buildings (a church symbol, etc) which could be toggled or a certain number generated.
Also, rivers that flow through or near the city? Maybe degrees of coastal-ness. And.. districts? Especially if we can name them and then save, but at this point you're probably rolling your eyes at how hard these requests are. I know with programming sometimes things are easy and sometimes things are ridiculous so I understand if some of these ideas literally won't work. :P