I think MB asks some very pertinent questions here. Things that we should all think about before and after shooting a scene and subject that made us stop for the grab in the first place. Your subjects being the roof tops of both the far and near houses is a worthy cause, but is also a very difficult one to gather in a way that can make the viewer appreciate what it is that you are bringing.
I do not think that dusk or dark would be the right time for this shot as the rooftops are dark and the street lights and cars lights are gathering all the attention. Try this during a time of day when the sunlight kisses the roofs and sets them off with hard contrast. Try different crops as well with different focal lengths. Attack it again and again until you get the message across.I like what your seeing . . .