Yeah. I love the idea of a Thalassian civil war, but even so I don't think the Blood Elves should ever loose Silvermoon/Eversong Woods.
Yes, we know what Alleria wants, but we also know what the BE leadership wants, and those two things seem incompatible, and even if it leads to a war, I don't think Alleria would win, or be willing to pay the price of victory.
At most, I would love to see the Ghostlands as a Contested Area with both VE and BE occupation, existing on a perennial state of cold war, but with a treaty that prevents aggression. If there was to be a "neutral" elven city, Tranquillien would be perfect for that for its location and name, and Suncrown Village rebuilt as the major BE city of the area. I just think it would be more interesting to use the Ghostlands to tell a story about civil war than any other option, cause that way we would get to see major interactions between both sides + rebuilding, and the story could finish with both sides having to come together to face the Amani, and thus signing a treaty at the end which would basically be "I hope you change your mind and return to us" "same for you"
(Quick and dirty map)
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Lol you could say that about them updating every other starting area in Cata then. Doesn't make sense to believe this when the precedent tells otherwise.