100% agree with OP, a shame the people actually in-charge of writting this meme of a narrative haven´t figured out by now.
Wrong, Aerie Peak and Gnomegaran literally didn´t exist as kingdoms as per WC2 (at the most they are just affiliated with Ironforge and would be have to be counted as such). Oh, and Kul´Tiras left by WC3 times, so that leaves Stormwind, Ironforge and the ruins of Dalaran as per WC3 (no Dalaran proper either dude, the existence of the city in Vanilla was yet another retcon of WC3).
SOOOOO… 2 out of 7? But sure, “most” of the kingdoms".
As a matter of fact, you are wrong again. When you take into account a good portion of the nobility from Stormwind traveled up to act as refugees back in the First War, you realize the “Kingdom” of Lordaeron had a healthy population of NOT citizens of the kingdom. Then when the whole Arthas fiasco happened, casually some “citizens” travel all the way back south into Stormwind… I wonder who had both the money AND the connections to easily do so, maybe the ones that originally traveled from Stormwind the first time around?
That´s the issue man… the “cultural presence and legacy” of Lordaeron proper has been explored and established in-game by two groups: the Forsaken and the Scarlet Crusade (who fought over the territory until the end)… the “survivors” that left the country to hide in Stormwind represent exactly that: the people with the means AND the will to abandon their past and look for newer (or maybe no even newer but older) pastures somewhere else, no regrets involved.
Well man, you can complain towards WC3 writers, cause unless you want to RP a Scarlet Crusader I´m afraid that´s the only other venue available in the story . The legacy of WC3 Alliance side was an ode to incompetency and pride, and unless the writting team changes their tune you people on the Blue side will never get any actual narrative roots into your story (I mean when the story of the Alliance in WC3 is about all the failures and defects they had BUT the story of the current Alliance is about how they are the gift of God from the High Heavens and more perfect than any biblical angel then one can see why this is never going to happen… these are two opposite narrative paths / portrayals after all).
And you will never see, cause story suggestions like this one HAVE gameplay ramifications… and unfortunately for you, none of the Alliance races can mirror this “idea” (ergo the Horde loses one capital / territory while you guys continue holding your exclusive toys for the lols).
Or can you replicate this with any of the Alliance races (make them lose their territory and “share” ownership with the Horde without stepping in a billion toes while at it? Cause I´m pretty sure you can´t.