My reasoning for it not being timegated is this.
How do you unlock world quests?
By finishing the campaign.
When are world quests typically unlocked?
Week 1
So when blizzard says that flying will be available after finishing the campaign… I take it to mean the same as unlocking world quests.
Yes, there are multiple campaigns within an expansion, and yes some of them will be timegated no doubt. But my point remains.
Have we previously had to wait till .2 yes.
Did Blizz specifically say this wouldn’t be the case moving forward? Also yes.