TGD: Yeah, that's more or less what I had in mind. Except I was thinking more along the lines of a West-East axis (including Kul Moren, Lalaton and parts further West), and a SW-NE axis (mainly lake and river traffic).
TGD, you ok with extending the trade route through Lalaton then?
Districts: The Posh district would probably be integrated with the Commerce district around the central market place, since that's where a lot of the money comes from. Maybe switch "Temples" and "Rich"? Not sure we need an actual Temple District. They're probably competing with each other any way, so they would be spread around town.
There may be some smaller docks along the river just below where you have "Temples" now. Probably started out as a dock area, But since the halflings put Jollita Bridge in place, it's now only accessible for the smallest ships, and being turned in to a pictoresque "harbor view" area for the rich. Maybe call it "the Old Harbor"? Port Jollita should also have some small docks of course (East of Jollita Bridge).