Does anyone else remember vanilla WoW lighting? It used to have excellent sun glaring through trees and the blue moon color on buildings? Sometime in CATA the lighting system was changed which killed nighttime for a while. Nighttime has since returned but that really nice lighting is still gone.
Here are some examples:
Notice how the lamps are more profound. Notice how on the ground, even in Teldrassil, there is a patch of sunlight in a small area, illuminating your character. Notice in the first picture, you can tell the front of your character is lit up..
I went to other areas in current WoW, where the sunlight hits your character and it is just not the same.