No She ain’t. Only you thinks so. Blizzard don’t, Canon lore doesn’t, the Void Elves don’t, and most importantly, Alleria doesn’t. Or are you trying to rewrite a Blizzard character to suit your own opinion. You could just write your own Fanfic if that is the case. You can make good money out of that, I mean 50 Shades of Grey was originally Twilight Fanfic. I mean both are rubbish, but if there is anything we have learned from Dan Brown and ‘The DaVinci Code’ is that some people will buy any old tosh and make you rich…
Might be trickier with Alleria though, as, well, I -think- she is a Blizzard copyrighted character, and Blizzard say she is a Void Elf, so…
What on earth…Right, She can’t lead the High Elves, because She…is…not…a High Elf anymore!
Besides, how can she lead the High Elves. I thought you only cared about Silver Covenant. She ain’t a member of the Silver Covenant…
How could she rule the Blood Elves? She’s the wrong Faction. She’s also a Windrunner!
Quel’thalas was a Hereditary Absolute Monarchy. Every ruler was part of the Sunstrider Dynasty. Now it is a Benevolent Dictatorship. The only reason it is not a Benevolent Autocracy is because a Benevolent Autocracy has no legal right to govern, it just does, however Lor’themar Theron -does- have a legal right to govern, as he was appointed Regent Lord by the Monarchy. The only reason it is a Dictatorship is that no one holds elections in Silvermoon, but equally, the Blood Elves actually seem really -happy- with him as their ruler.
Now the Windrunners are not noble. No they’re not. They were never part of the Convocation of Silvermoon. They -Do- have a hereditary position, which is that of Ranger General. (A Stupid way to decide Military leaders, but hey ho).
Problem (for them) is that they lost that status. Vereesa is a treacherous Exile, and would not last ten minutes in Silvermoon (Pretty sure a lot of Sunreavers who now live there have an axe to grind) Sylvanas can’t hold it because she is a treacherous Exile from the Horde in it’s entirety. Oh, and she’s dead. and Alleria, whilst not an exile, or particularly treacherous, is on the faction that the Blood Elves will never join so long as Vereesa and Jaina live. And married to the current Lord Regent of the Alliance.
Plus, of those three Windrunner sisters, only -one- of them earned their rank, which was Alleria, and her rank was Ranger-Captain.
No, a third Elven faction (Which will not happen, WoW is too tied to the ‘two faction’ system) would be one formed of a union of the Shal’dorei and Sin’dorei, jointly ruled by, what it now seems are two Lovers, Lor’themar Theron, and Thalyssra.
Nobody would care what Vereesa thinks, Tyrande is off being all Tyrande at the moment, and there simply aren’t enough Void Elves for anyone to really care about them.
You’re better off seeking more customisations for Void Elves, so they can look even more like High Elves, to be honest, and keeping them on Alliance side.