How many "WoW more realistic and edgy would be so cool lol xD" posts do we need...realism isn't about graphics, it's about art style and by creating games that aren't realistic Blizzard displays a high level of imagination and creativity, compared to all the "look we've got dudes with realistic hairy arms" developers.
Also WoW's art style isn't even that saturated, it has pretty normal colour schemes with some brighter areas but I really don't see any serious saturation. If you want saturated take a look at Wildstar and similar games that have come out lately, now that's some ugly saturation.