I'm not sure what the WoW team has been smoking when they've been making Naz'jatar and N'zoth into patch content and the stupidity of Shadowlands into an expansion.
Shadowlands should have been a super slow build up like N'zoth was and should have been expanded over multiple expansions OR just dealt with a tip of the iceberg scenario in a patch. Not the in between we got.
Emerald Dream honestly was perfectly dealt with in Legion where it created as many questions as answers and didn't just start and end an entire massive world on it's own like Nya'lotha or Naz'jatar.