He said it's not based on varying European mythology, yet almost all of it is. His feelings or personal political beliefs dont change the fact that it is. The people who created the lore originally created it so. This forced inclusion of modern political ideals is an exclusion of the identities that created wow lore borrowing from their ancestors history and mythology. Do you watch Crouching Tiger hidden dragon and get mad there are no trans people, white people, black people, etc.? He doesnt realizing he's contributing the the erasure of his own culture and history. While it's just a game. It's happening in every aspect of world politics and entertainment. It does matter.
I am glad that there will be more about Sylvanas' motivations. She is the most complex and interesting character in Warcraft lore and I cannot wait to explore more of her.