There seems to be at least some kind of intersubjectivity in regards to this issue otherwise the thread wouldn't have as many pages as it does.
I've never heard someone say "this doesn't feel like Warcraft" except for MoP and Shadowlands. We already saw Outland in WC3 so it wasn't really surprising to see that it looks very different from Azeroth.
This is such a weird comment. Even a child would understand the hyperbole. Humans, beasts, plant people and Undead are incredibly common in fantasy universes. Therefor pointing out that they still exist in the newest Warcraft expansion cannot be an argument for why it should still "feel like Warcraft". What matters is whether the context in which these things are used within the Warcraft universes has changed. That's where the real discontinuity can be found. That's why people feel "cheated" or think this doesn't feel like Warcraft.
Take the undead for example. Prior to Shadowlands if you saw an undead it would have either been some kind of cursed being, a creation of the Burning Legion or Scourge (meaning an Undead aligned to the Lich King). Now we got an expansion with a zone full of Undead who look the part but possess none of the qualities that defined previous Undead. In fact you could probably exchange the entire zone aesthetic of Maldraxxus with something like the Valarjar and the story would still be functionally the same (you'd have to rename some things but at the end of the day it wouldn't really matter). It is the decoupling of aesthetics and the meaning that was previously tied to the aesthetic that causes people to go "this doesn't feel like Warcraft".
And I'm not even getting into the whole Undead in the afterlife thing when the definition of an Undead is a dead soul that is cursed to wander the mortal plane.