All salient points. Sylvanas' arc is fairly cohesive and believable. I suppose I just lament her not going down the path I would have taken her down (I would have made Genn the villain of BfA, forcing Sylvanas into an accidental anti-hero role, validating Vol'jin's choice and avoiding a repeat of the Garrosh arc. But hey ho!).
That sounds very plausible. Especially with all the merch they've been pumping out of her recently! Time will tell, I suppose.