The answer is simple and in the phrase they love "The story we want to tell" They wanted Alleria and Thalassian elves to be relevant for a cosmic story so they made up void powers for them on the spot and now people accept it as gospel like they've always been around. They could do this for any Horde character or race but they choose not to because they don't care about them. The only reason draenei get any love and attention is because one dev on the team really loves them and that's how development works now ESPECIALLY in the all-neutral questing era where they no longer have obligations to write bespoke Alliance and Horde content. Without obligation to write content they don't care about they can just do the same humans and elf content forever and for the elf content many of them on the team are just the kind of people that want to play Legolases or pretty elf girls as said above and don't care much for the specific lore. The only exceptions are stuff like the Amani where it'd be impossible to ignore and they'd get crucified by their favorite Twitter posters for making them generic baddies
That sounds ridiculous but who is going to tell them otherwise? They got rid of all their historians who even admitted they were just optional encyclopedias and only stepped in if someone got the physical anatomy of a race described wrong, they have no lore bible or primary Warcraft sourcing and so the quest and story designers of WoW are in charge of the setting itself, they even had Metzen come back and downgraded him to an advisor with no real power after he blew all his capital with the trilogy idea. Sean Copeland's wife even said that the people that came after Metzen only care about their few fave things in the setting and nothing else. "No negativity in the dojo" dates back to Bfa and they doubled down on it after the lawsuit: let devs work on whatever they want to make them happy because you can always blame everything wrong with the game on the gameplay devs
It's how you get the total flop of an Amirdrassil story because nobody internally wondered about night elves actually living in the 80% of their homelands that were unplagued until people on Twitter brought it up before 10.2 came out or how the Ysera storyline in DF was a complete waste of time with nothing happening just repeating something that happened in Bfa already. No negativity in the dojo means no asking common sense questions before you spend all your time and resources on a story where the logic falls apart from 5 minutes of questioning
Maybe the utopian approach would be every race having someone that loves them as much as the draenei one does but the average writing quality and care for the setting hews closer to the one Remix dragon that says the void elves are from Suramar than that one dev

There's been so many plot hooks for Kalimdor back during Dragonflight that I can easily see a Kalimdor revamp expansion working. The Night Elves restoring their lands, the Orcs bringing life to Durotar and the Barrens, the heavily teased Draenei city...
There just isn't really an obvious threat to tie it all together- I'd be fine with a more peaceful rebuilding expansion with just one-off villains in each patch, but that'd be a huge change and probably have less mass appeal. Maybe they could use Azshara trying to reclaim her old territory, or something with Magatha?


I suppose the sword being dealt with in the end cinematic could be a entrance to a Kalimdor expansion.
Let's say hypothetically. Sargeras/Azeroth pull out the sword to deal with whatever the final threat is for good. (I imagine Sargeras killing Xal'atah after she eats/merges with Azeroth and ascends to a higher being)
Is the hole remaining a problem? Does it unearth something? Do we get the Qiraji coming back in full force?
It's potential for sure. Just depends on if they plan to address it at all or wave it away with druid healing.


Idc what gets updated in TLT, I WANNA FIGHT THE DARK TITAN!!!
are they going to announce animated series for midnight at all?