Hey Steffen,
great attempt, hope you get this finished.
You've got a "hill with wetland" east of Lakash. A wetland upon a hill? I'd expected it to be somewhere downhill near the river, for water flowing down and not lying around on top of a hill?
The shape of the land looks good already and you have all the vital things in it, that such a city would need.
Maybe you could think about the history of the city. It seems to be a city that developed randomly and was not founded by a city planner. So city growth was widely natural and uncontrolled. Maybe you could think of the times when there wasn't a city in that place yet. Why would people want to settle down here back then? Where would they start? What would be the natural (easiest and best) place? If you find that spot, you've got the nucleus of the city and you will know where the eldest roads have to go through.
If I start on a big city (as I did with Serain) I first start with the big roads that lead far away as they are usually there before the city is founded. Then I add the roads to local sites, as nearby towns and special places, as river bridges, castles upon hills and stuff like that. Done with that I have the main roads that will be the axes of city development and growth. Then I add further streets, that connect those big roads with each other and so I build up a web of streets and roads. While doing this I keep in mind the overall history of the city, not every detail but the main timeline. Also geography plays its part. The rich will settle where the weather is best (fresh air, water supply, short ways to important places, enough space to show their wealth) and the poor will take what's left.
I think there could be some connection between the city itself and the Shinsu-Enclave, some road and on the road newcomers will settle down. If your city is walled, think about the walls. Where were the first walls and how many times have new walls been built? Walls are essential to city shape and identity. Newly arrived settlers usually are divided into those who can afford a home inside the walls and those too poor for that who have to stay outside. For outside the walls the land for buildings is much cheaper as it's less safe. And if someone has to build his new home somewhere, he usually does this on an empty spot on a main road to be easily connected with everything. If there is no such free space, they will start radiating out with the next central point in the center (city gates, great place, market etc.)
Hope that helps at planning.