I've been watching Battle Royale and I have to ask, was it always this dark? I have multiple copies of the DVD and I remember it being dark, but not so dark you couldn't make out the faces of people in the night scenes. It could be my setup but I haven't had this problem before on Netflix.
I had the same issue. A lot of the recent pick-ups have been lower quality. They recently got a bunch of old films from AIP, and they all look pretty terrible.