I am ranting is what I am doing.
But yes, I do agree.
My initial gut feeling for the final raid of the expansion was us returning to Azeroth in some capacity. I later assumed the final raid would be Torghast but now that avenue has fallen through I imagine my initial gut feeling was right.
Not sure what Oribos could add beyond what we already have though. All hints for the new raid hint at some part of it at least taking place on the Arbiters platform. At worst just as an area for the players to be sent to after Sylvanas is defeated. Not sure what another raid there could add, not really like there is any part of it that really jumps out as somewhere interesting to raid. The only one that seemed like it was is now being used in the Sanctum of Domination.