A humanoid worgen population with no faction affiliation apearing out of no where.....that could live their when Gilneas could not. If your reading the quest thats far fetching.
And your making the argument about UVG retcon yourself. If those forces in Gilneas wern't alliance than it was already abandoned by alliance. That is the retcon. Everyone expected the events in Silverpine forest ended with the alliance pulling back behind the wall. UVG writer claims about Gilneas being abandoned made only sense if the alliance left Gilneas at that time.
I still found Cataclysm equalising weird. No one was too concerned about, they mainly were about event in the story rather than foothold. And the big effect on the story is still their alliance background. In WoD they did the same as well. Alliance large empire being attacking on all sides loosing stuff but defending. Horde coming out of the cracks advancing gaining new alliance (2e orc clan to my knowledge).
Alliance is set up to loose stuff and their gains are mirrored. Granted the Dwarven clans joining together was a gain that wasn't mirrored.
I do think alliance questing style has certain advantages though more depth. But Cataclysm events and the ignoring Horde agression and letting it slide because of a big threat again and again is breaking the alliance lore.
Now WoD nothing happened but going a bit of topic Legion is opening old wounds, especially with Dalaran.