No, like @
Soon-TM said, she did turn on Sylvanas, except instead of her being a renegade protege that rejects Sylvanas's world view and reconnects with her people she crossed a continent through the magnetic field of Calia's tits and was cured of her depression by this human princess who shares neither her background nor her religion. Then she may or may not have joined the Horde. We don't know since she disappeared.
So I was right in a way entirely contrary to what I expected. Both @
VladlTutushkin and I, who are radically different on the Sylvanas question agree that this was a terrible resolution, but since we technicality never saw her reject Sylvanas on-screen, only join Calia and presumably the Horde, I've put clauses in here to explain what'd qualify and force me to either lose some of my wallet's contents or lose honor and have to pull a Sadfang.
As for Sylvanas's appeal, @
Darth-Piekus, she was the only driver of conflict in the entirety of BFA and essentially the last stand for the Horde being something other than a discount Alliance populated by Anduin's orbiters, even if that something else were mustache-twirling dickheads. I don't think you need me to explain to you why the extant Unifaction cast are all boring clones of one another, I think you can trust the writers' call to put them all in a time-out while focusing on the far more interesting Shadowlands content. Past that she was the face of the Forsaken for a reason and they and the orcs are my favorite races.