Originally Posted by
Queen Alleria Windrunner
There would be no "Grey" in the Invasion of Quel'thalas. Theron is a dictator who controls the minds of dissidents (such as those two Priests in the market) and exiles anyone who doesn't associate with his political agenda (Veresa, Umbric, Alleria...).
In addition, as the Void Lords themselves stated, Alleria Windrunner is the rightful Queen of Silvermoon. Indeed, House Windrunner was always one of the most powerful of the Kingdom, and with the Sunstriders and Sylvanas out of the way (the dead have no rights), Alleria has the strongest claim to the throne. Even the ominous and omniscient Void Lords aknowledged that.
Do note that Alleria wants to build a new future for every Thalassian citizen, a future in the Alliance. A golden age where the old cultural divisions are cast aside to usher in a new society driven by freedom of speech and religion. She does not want to kill every single Blood Elf in Quel'thalas.
As for Umbric, after everything he has suffered, he deserves a happy ending. And he would make for a great ruler, seeing as he cannot stand the dark seed of tyranny that has unfortunately taken root and festered in the black heart of the Horde. Although Alleria deserves to be Queen more than Umbric.