Well, granted, i was in a game session at night last night. Cloud cover, and fog. There was indeed a bit of light coming trough the clouds, but i was near towns because it's kinda important especially at night. Perhaps a slight tweak is fine, but creating artificial light or worse yet, creating that EA/DICE blue night filter is a totally unnecessary step that I personally would not welcome. The best idea is to strike a sort of ambient balance that's authentic, closest to realism, just not too crazy.