I mean that was generally the sentiment expressed my a large number of people who objected to MoP. "LLOLOLOLOLOL KUNFU PANDU BLIZZ DUMB KIDS" was basically their rallying cry.
Asian theme fit perfectly well. And "European medieval fantasies" steal/use asian cultures all the time. Draeni and space demons are hardly medieval fantasy, nor is WoW's rampant steampunk aesthetic with goblins/gnomes. I can think of a long list of things that fit far worse into a strict medieval fantasy definition before we even come to "Asian armor and architecture also based on the same or similar time period as European medieval armor/weaponry/architecture". We didn't see near the same reaction to Zandalari themes in BFA and that's no less different than Asian themes from this "European fantasy" we're all playing.
Don't' care if you don't like it or not, but the "doesn't fit European Medieval fantasy" argument is just plain ridiculous given the hundreds of vastly more significant ways WoW deviates.