The building lights for the skyscrapers in the major cities at night time are the same color which makes the buildings look very boring and ugly. I would recommend that you introduce new colors for the building lights such as yellow, blue, green, purple etc. Maybe research the lighting for iconic buildings and have their own profile
Would love to see this for whole key areas. Vegas Strip, TImes square, Shinjuku, etc. Right now even hand modeled buildings like the Tokyo skytree are incredible vfr disaster waiting to happen with no light at all at night. Why bother modeling the thing and then not finish it off with some lighting?