The problem with Garrosh, is that he made the ORCS stronger, not the Horde also... Sylvanas is most likely a temporal warchief cause Vol'jin is MIA, she's basically the Warchief, cause she's a great war commander...
(Also... if you don't want your friends to rebel against you, try not to point your sword at them)
still there is no way the others races follow her, only if the sky open and thrall come and say to everyone follow her
1- the orcs still dint have a racial leader, most of the chieftains have their own kind of business, she cant control all by force
the only racional and right choice is put Saurfang as warchief, or at least racial leader, and the warchief post be empty
Well... she may not be the most beloved leader, but i'm pretty sure the other horde races at least appreciate her as a great asset in combat, and right now... that's what they need, remember that they are fighthing the Legion.
That doesn't mean that all her decisions will be fully accepted, there could be many things that are questioned by the other members of the Horde
In the cut scene at the end of the Garrosh fight in SoO, I was hoping to see him at the big reveal. I love his answer in Warsong hold when original Garrosh asks how Saurfang deals with his memories: "I don't eat pork."
AU Saurfang is standing in my Garrison as I write this, can't recall if I've seen him elsewhere. Was hoping to see Broxigar too, he's awesomesauce.
And if they do indeed kill off Vol'jin, I have one question.... who's going to open the ceremonial keg at Brewfest, hmmm? HMMMMMM?