AFAIK none of the old gods are dead. They’re all “incapacitated”.
WoD is still part of lore. Yrel isn’t a threat because they have no bronze dragonflight to come to our timeline. It may be a story that’s picked up in the future or not. There is nothing to suggest WoD was retconned or removed.
It possible if we ever have a “war against the evil light” expansion that we’ll see Yrel and her lightbound again.
I think the idea of playable blood elves with blue eyes is that a group of high elves who refused to participate in Quel’Thalas society when they were mana vampires came back once the sunwell was restored. Their population is probably comparable to that of void elves.
Yeah hasn’t explained why only half of Uther’s soul went into frostmourn that is weird. Bolvar had talked about his visions before briefly to the player DK in legion. But he wouldn’t elaborate which goes with his character.
All that being said
GIVE WORGEN TAILS!