This, and there's another thing: faction conflict is a topic that has been discussed for years. Sylvanas, Jaina and purge of Dalaran, Theramore, Garrosh making Horde great again - these are things that are still discussed even today. The fact that it has been going on for so long means that neither side has conclusive arguments that would make them right. I think it shows that Blizzard was atleast partially successful in creating morally grey story with the faction conflict. And then you have the big bads. Does anyone even remember Sha or Lei Shen? Or how pathetic the Iron Horde was? The clusterfuck of lore that was everything Deathwing related in Cataclysm? Going through lore forums, it seems like nobody really cares about Void Lords either. The "big bad" lore has been the least interesting part of WoW since WotLK.