It not being fully 3D doesn’t mean that it’s of lower quality.
For example when consoles got powerful enough to draw 3D backgrounds you could see a significant decline in background quality, since you can have a higher quality 2D background for a fraction of the resources.
My screen gets dimm enough that it’s almost impossible to see outside with the slider at the left.
The solution is extremely easy though. Put an option in the settings so pressing volume up/down while the screen is locked changes the brightness instead of the volume.