Your work with this item was just incredible - The art is incredible, the reference is great, and I think I don't need say anything about the faces...

That is really great!!! :D I love it!

1. Try adding more texture to roofs and more contrast at the buildings.
2. No, DON'T dare you change the shading, it's pretty good.
3. You can add the head of Sebastian Phoenix, as well. xD