No, they are not abandoning New Eridu, it's just this story arc season will take place outside of it, like S1 Chapter 4 took place in the Outer Ring, it was a aria outside of New Eridu, and after the story arc we got back, because the story designed to explore the world
And as I said, Roscaelifer is a whole different City, it's meant and designed to be different
Why are we expecting it to look similar to what we've seen before?
This is like going to Cairo and excepting it to look like New York
ZZZ is not just New Eridu and Sixth Street, it's a big world and the writers want to explore it
Anyway, arguing now is not the best thing to do, you people need to wait and see things unfold