Dont need to worry about that because they already said
Although that statement isnt entirely true. Warriors were the immediately the strongest melee in TBC and Vanilla. So there really is no track record of them having to wait. Its probably why everyone is all fussy, they are use to being the strongest melee for the entirety of the game and not having to wait to scale.
Blizzard should said “Hey were mixing it up and you’re gonna have to have to wait past 2 phases for a change”