Unless the number of lights is making the render time give you a problem, I think you might as well keep them. Normally I place a limited number of photometric lights to approximate the lighting which would be visible through the windows. Not random scatter, but not doing the full interior lighting for each room either. For example, if a room has 50 recessed lights in the ceiling I will make the same quantity of light with 5 lights. Usually these are diffuse point lights or sometime spotlight, occasionally IES.
I did see a very interesting rendering that had self-illuminated images in the windows but I've never tried that myself.
The change you made to the green was good, but more could be done with the color. My overall impression is that it's a bit grim or unfriendly. Whether this is good or bad depends on what the building is for, and who the rendering will be presented to. If it's going to be used to promote the building, then it would worthwhile to make it look more inviting. I've normally done twilight rather than total dark night when going for a "warm and friendly" look, with interior lighting on the warm side to contrast the deep blue of the sky.
It would probably be helpful to spend time looking at renderings in the gallery (and night/twilight/sunset photos of buildings) to see the different ways night lighting can be handled. Then decide on a particular look and adjust the lighting with that in mind.
Interested to see how this one will develop.