This is true to a depressing degree. What did we actually learn about Urqopacha, Kozama'uka, Yak T'el (to a slightly lesser extent), Shaaloani, or Heritage Found/Yyasulani during our travels? We learned a bit about the cultures that reside in each of the areas, but very little about the areas themselves. We learned absolutely nothing about Erenville's home.
We never got to truly explore any of these areas. We're simply dragged through them by the plot. They're very pretty, yes. But what else is there?
I can't bring myself to care about the new zones past how the look or the music because it really came across as though the developers didn't care either.