Never fails to be an arrogant statement, seeing as how what is considered to be high quality varies so hilariously from player to player. Let's not forget that Legion didn't start out viewed as peachy as it became once it had all content on the table.
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No use responding to such short-sighted people, really. They're always around and they always act as if the game is "literally unplayable" because they're not having fun, meanwhile the rage would in no light terms be cataclysmic if they pulled another WoD, only this time despite actually having planned content beyond the .2 patch, unlike WoD.