I think the only reason right now that i would want to be able to change exposure is to fix the bug in the game naturally without modding or editing files, the bug that locks you out of progressing the game when your sleep over at boo's house, and says you can't move in the nude, and forces you back into your inventory something like that if memory serves, couldn't put anything on to walk back upstairs lol.
In order to fix that I had to edit the game with rpg maker and do some things I can't remember off the top of my head, but it might have some unforseen errors in the future of the gameplay.