I'm 100% with you on the score that "Thrall is done"; his story completed when Deathwing fell, and he's now the World Shaman which (to me) is a full time job. Once he calms them all down, it's effectively his racket to keep them calm and relate to them in a way only a shaman could.
That said, I'm also with you regarding his involvement being minor and that being a sign that he's not going to step up again. It would be extremely strange to see this uprising with Thrall playing no part in it. Yet... It was he and Vol'jin who founded the Horde, which is potentially why Vol'jin might take on the Warchief mantle temporarily. This is assuming the title stays as we understand it now, of course.
All that said, would the armour of Orgrim Doomhammer weigh well on Lor'themar Theron? I'm slowly coming round to the idea that it would.
Despite my deep cynicism about Metzen and him choosing to shoehorn Thrall back into the limelight where he doesn't belong... I can't shake the feeling that Garrosh is going to finish what he started before the Scourge invasion that sent him to Northrend. I just feel... I don't know. I think the story of Thrall is really about to end, and it's this fact that gets everyone, even orcs, to finally give up on Garrosh.
---------- Post added 2013-06-25 at 02:44 PM ----------
I think they'll do away with red and blue entirely before a third faction arrives.
I think i would be intersting for the future battle between horde and alliance if the alliance would turn on the revolution and destroy Orgrimmar scattering the horde, leaving it warchief less so to say. So that the horde would have to rebuild itself and take vengence on the alliance in future xpacs. Just a thought
Saurfang, he's perfect, he has the intellect of Thrall and the power of Garrosh