We do know that there are still pockets, on both sides, who remain hostile towards each other.
You must have not played past 3-4 expansions, that were entirely about Horde’s internal conflicts that affected everyone.
What shift of power are you referring to? There is are none as far as I can tell. Horde warchief remaisn horde warchief. Alliance king is still king of alliance - Anduin.
I’m sorry, but I am having hard time following this thread.