If we look at League of Legends and other such games, over the years there have been massive graphical improvements.
But with WoW it looks fairly similar to when it first was developed. I get that they want to go for a certain artstyle but some of the textures in particular look like a game from the ps2/xbox era.
Shouldn't Blizz give this more attention? It no doubt is a major factor why new players don't bother trying the game out.