You read that right. Not Warchief of the Horde, no, not even on a drunken dare would I suggest that because Shandris is frankly too cool an underused character to be saddled with something that ridiculous. No, what I want is for the Alliance to create a Dux Bellorum, and I want the job to go to Shandris.
There are other candidates, to be sure. But most of them are rulers of nations, and what we need is someone who can lead the combined military of the entire Alliance. Varian is a King, and needs to start ruling like one, frankly. Tyrande, as High Priestess of Elune, is similarly saddled with responsibilities to her people. The Council of Three Hammers is as yet too disjoined and contentious to even lead the dwarves fully, and so while Muradin could fill the position (as could Varian) he's busy. The gnomes are too focused on Gnomeregan and Gelbin Mekkatorque is not a warrior by nature.
At this stage, with the losses of the Cataclysm and the looming war, I think it's fair to say that it's time for Shandris to step forward. She's been (in my opinion) criminally underused and kept for far too long in Tyrande's shadow. This is a woman with over ten thousand years of military experience, and it is long past time for someone with that kind of acumen to step forward and lead armies in the coming conflict.