Here's a bit more playing with areas to see what could work.
I'm thinking for the foreground buildings it would probably have been a good idea to model more geometry and texture them and then just touch it up in post. With the mid and background buildings just doing matte painting would be fine

If anyone knows where there are highres references of skyscrapers or building textures then let me know - the original size of this is 4000x2500 and I'm having real trouble finding decent textures

This one has the depth fog still in just so it shows a toned down version:


Si