I would love it if I would be able to design my cities based on the current roadmaps I have designed. Is this possible?
Currently the only control you have over roads is a choice between "normal amount of roads" and "many roads". Eventually it will become possible to draw roads more or less freely, but it's not going to happen soon. How do your roadmaps look? I mean how detailed are they? There was a request to be able to specify where do roads come from to the city. I consider to add something like "northward roads=on/off, southward=on/off etc..."
I'd certainly be fine with being able to dictate some road directions. I use your generator in combination with Azgaar's Fantasy Map generator (https://azgaar.github.io/Fantasy-Map-Generator/) which has allowed me to VERY quickly put together a campaign with minimal effort on my part and allow my players to have a ton of fun exploring without me having to worry about being super detailed about every city.
Some of the towns they visit, though, only have one or two roads and not being able to pick the number of roads and where they lead into forces me to regenerate away from layouts I actually liked. The direction doesn't have to be perfect, since your updates allow for warping of the layout, but not being able to at least delete a road I don't want does hamper things a bit and I have to tell my players "Oh, that third road is just a logging trail."
Your generator is absolutely fantastic though.
As @Quenten said, in the current version of the generator it is possible to specify the exact number of gates (=number of roads). To do it add the "gates" parameter to the url (of the non-itch version of MFCG), for example: