Once they get the city and street lights fixed, I think the night lighting will be fine. Agreed with everyone above that the level of darkness currently in 2.5, based on moonlighting, seems perfectly fine to me...it is dark at night. The only part that I see that needs a little work is the lack of lighting given off from street lights, cities, etc.
This shows a pretty solid view of what city/street lights should look like against a pitch black sky (start at around 2:25):