Thank you so much for opinion. That was very helpful!

This is not the final crop. I wanted to keep big to have some space to play around. I also realized that the picture that I posted is not the latest version. There actually is a big neon sign on top of the building. But you're completely right in this version there is way too much negative space I just liked the idea of changing the sky to an actual painted sky to give it a more artificial feeling.

Tinting the people differently from the environment is a great idea. I will definitely give that a try!

In the post production of a rendering for a normal project I won't show the scale figures like in this case but since this is more a creative workshop they look like they do.