Disagree on that, but again things like these are
always going to be a matter of opinion and those always go in circles in this thread.
Your 'mapping' is largely interpretive based on your imagination and while I agree it is part of the creative process for sure, I definitely wouldn't put the art or what you've interpreted on the same level as actual files added to the game named by Blizzard themselves (the latter of which, names, are rare these days).
If it were a evidence ranking, I'd put it a few ranks below "in-house Blizzard concept art" (e.g. the visual zone development stuff here:
#1 #2 #3), of which most of the concept art they make won't actually end up happening (nor even seeing a public release on ArtStation if it's extremely unused) either.
Then a few ranks above "in-house Blizzard concept art" is going to be assets (including icons) from the game, which aren't exactly a guarantee of something happening either (there's so much stuff in the files that never sees the light of day).
While I agree that it is awesome art that
influences their general world building themes and early in-house zone concept art (like linked above), that's probably about it. I don't think it's worth going any deeper into it than that, definitely not to the level of trying to connect very specific things from the art to current/upcoming lore or future content. The release of these kind of image sets would have to go by the outsourcing people and they wouldn't okay anything that is specific enough to tie to upcoming content like that. And if it is used by future content in a direct enough manner, by us calling it out and focusing on it like this that is a great way for them to not work with said company again.
EDIT: Like Blizzard says on working with West Studio, it is just influencing, which is not as on-point/lore-specific as you're interpreting it to be.
In
one of the ArtStation posts by Jimmy Lo from the Visual Development team he specifically thanks West Studio for early ideas/designs that
then go into his own concepts as well, so definitely below in-house art/assets in terms of relevance if you ask me.