I have no control of the things done in Assist, I'm simply commenting on the aspect. Just because I have admin here doesn't mean I do anything for the project/game

With that said, I do play around with maps and it rubs me the wrong way when some pro gamer comes along and starts messing with settings to make things look/sound how he thinks they should be, not the way you worked hard to intend them to be.
I would bet money that the AA devs didn't say "oh just edit your brighness" when people complained that a map was too bright/dark in beta testing. They fixed the map. They made everything usable and playable. Everything is intended. That little dark corner that you can't see very well, it's meant to be there. If your monitor (this also applies to audio) is calibrated properly then you're seeing exactly what they intended.
I recommend calibrating because it sets proper color & brightness up across the board. If your monitor is displaying colors properly then EVERYTHING you use is shown as intended by it's creator. If you tweak the settings in AA then websites and other games are going to be different. Designers that get paid for a living will use equipment that is more accurate they also have a skillset that tells them what things should be like. Combine those two things together and there's no reason for an inexperienced end user to say "nahhh it's too dark, i'm raising my brightness".
Play the game as it's intended, both audio and video. Unfortunately, that'll never happen and that's why I'm actually pleased that brightness and gamma are somehow broken.