As for being unfinished in these cases, the word I have heard, Fenoxo has given his blessing. Now, is this due to that is the way it was meant to be or was it because they were not completed but Fenoxo et al did not want to work the thresholds to reblock if they were crossed, I have no clue.Again, sorry for the shape of this response, brain mishaps are a major pain. :/
Well seems mrttao already said what I wantred to say which was: both locations are accesable after first visit due to not both been filled with enough content to justify cutting off access to other place (and well somehow desert city was mostly reciving more love during days when CoC was actively denveloped, so it ended with tons of stuff when corrupted counterpart had little). So if that limitiation will ever show up it will be probably only in mod, when both places will have enough stuff to allow locking them behing certain corruption treshold.
Also no worry of response shape as my brain fully understood it