Uhm no.
But yes to "they didn't care enough*.
Obviously they didn't.
There is never going to be a 4th spec for any class that doesn't have it already, as shown with how Survival turned into melee instead of a 4th spec.
Why? Because they would've had to design another artifact and storyline.
If it's a thing, it's going to be a new class on top of a new expansion.