I'm all for exposing as many graphics options as are reasonable to be able to adjust.
Getting rid of the slight green tint was good, but IMNSHO only a minor increase in contrast was required. In cave A, for example, in the after shot most of the visual information about the path the characters are on is lost: depth (where is starts leading down), width (exactly where the path stops and the stalagmites begin) and just details in general.
Welcome to the forum.
