Wow that's a pretty big improvement! A few points as always - would a city in the desert have a grass interior? Maybe some patches of grass but not golf-course material I wouldn't think. I think the next step for you (not an expert though) would probably be adding the city wall(s). That would blend the border between what is now grass and desert and I think would help you divide the city into different districts, if that's how you plan to go about it.

Interesting work so far...