Wanna see something funny? Do you remember how we were teorizing that this change happened, bcs some people (myself included) were complaining that they dont actualy *see* anything in the game, even tho their character *have* Darkvision ... So Larian decided to make whole game brighter, instead of fixing Darkvision?
Well guess what ... it didnt help either:
Imo they should do something like the light radius system from Diablo 1 and 2. It is imperfect but making the surrounding glow more around a darkvision player would help.