We really need to drop the terms "robot" and "3D-printed" - the Eternal Ones are souls inhabiting construct bodies, just like the humanoid forms of the Titans are just constructs/golems given life by their souls, just like HFC's Socrethar, or souls possessing corpses, like the first-generation Death Knights, or Xal'atath using Inanis' body.
The Eternal One's bodies are just more advanced because they were literally designed by the oldest and most powerful beings we ever heard of.
Bit of a headcanon: the Eternal Ones are souls that were born elsewhere, maybe the first generation of world souls, and then raised by the First Ones or their underlings to administrate the Shadowlands. This would also explain why the Winter Queen calls Elune "sister": likely still not biological, but what if similar souls were nurtured alongside them, but taken to other realms?
This kinda clashes with OR is confirmed by the Prototype Pantheon:
"Bereft" could mean that these were earlier bodies the Eternal Ones inhabited, but later got different bodies more akin to the one we see when killing Zovaal. These discarded constructs still maintained a fragment of the Eternal Ones' powers. Or maybe in this iteration, the powers were tied to the construct bodies, while the latter one imbued the powers into the souls directly, allowing them to inhabit more generic base constructs.Bereft of the cosmic spirits of the Eternal Ones, these incomplete host bodies can only carry out their base directives without mercy or compassion.
Wasn't that, kinda, the PvP track in BfA?
tbh I can't even blame the Horde anymore, I only blame the vocal minority pressuring Blizzard into reigniting the Faction Conflict because they either wanted to play as the evil brutes/schemers that the Horde hadn't been since WC3, or as the knights in shining armor opposing them.
This is also why I feel dread about the hints of changing the login screen, it might be a kneejerk reaction to the "outrage". But even if that's just stuff that was already planned, e.g. for an evolving scene as speculated, the bullies will see this as proof that their constant complaining works.
Not that I'm an expert on that, but it would fit with a "3-act" structure: we know the ultimate destination, the world soul, but the end of TWW = Act 1 literally sidetracks us, instead of going deeper, we are lured more or less horiozontally towards the Rootlands or something else. Then Midnight = Act 2 forces us to to back to the surface to hold off the Void invasion, seemingly further from our goal than ever before, and in TLT = Act 3, we race against time and Titans to save Azeroth.
Oh right, Midnight was announced to have one, right? Tbh, Blizz should hold off on that until 14.0 - let us become symbolically overpowered (with some planning we'd reach/cross iLvl 1000 at the end of TLT) but afterwards, as Azeroth either is born and leaves, or dies, we lose all the power she invested in us, depowering us on a meta level.
Going on a tangent about DF's group events based on your phrasing:
Soup Event, Siege on Dragonbane Keep, Researchers under Fire, Superbloom, Big Dig: all great fun events
What was not fun about them was that they only happened at set times, disadvantageous if you had limited time or wanted to take some alts through them as well - Soup was easier in that regard, and you could shard/warmode-hop, but the latter of course shouldn't be officially encouraged behavior.
These should rather happen over and over, with Scenario/Delve tech to shard you with other players (with some buffs if there aren't enough people around at off times)
Have only heard bits and bobs of the TWW events, but it's good that you only "have" to do 2 out of 6 per week for max rewards, then again you only had 2-3 relevant ones per DF patch/LH week anyway, too.