I disagree with your last point, as I've yet to see a reasonable argument to convince me that Voss would kill, dethrone, or replace Sylvanas, as I think people seem to be imposing more depth upon this character than she actually has because she's badass.

Firstly, Anne pointed out that Voss doesn't really consider herself Forsaken, she holds no ties to the Forsaken or undead, and therefore has no real reason to involve herself with their affairs. Her business is the Scarlet Crusade, it seems she really could care less about anything else.

Secondly, I didn't see any real rage or hatred focused on the Forsaken or on Sylvanas. It's not like she's running around purple-fire-smashing Brill or the Bulwark. Sure, its reasonable for her to be mad at Sylvanas for raising her, but she's not exactly a reasonable person. If anything, the Forsaken accepted her for who she was, they embraced her and attempted to support her, unlike her living allies, who put a price on her head.

Thirdly, even if she did attempt and manage to kill Sylvanas, I see no reason why she would attempt to restore a human to the throne, it simply doesn't make any sense. The Forsaken, even those who didn't necessarily support Sylvanas, aren't going to sit there and chill while a non-Forsaken takes control of their lands. A Forsaken leader has to have the support of his/her subjects, its not a "bow down to the new King" thing necessarily. Voss also has absolutely no reason to trust humans anymore than she trusts anyone else.

If you ask me, her future lies much more with the shiny new undead-Scarlett Crusade than with the Forsaken.

"Sure, its reasonable for her to be mad at Sylvanas for raising her..."

Not really. Everyone has a choice, and their free will is respected. If anyone doesn't want to be undead, they're free to refuse the offer and drop dead again on the spot. Indeed, as I recall from the starting zone watching the Val'kyr doing their business, most of the attempts end in precisely that fashion. Anyone who decided to live on as undead rather than refuse the offer and remain dead has no one to be mad at but themselves. Being mad at Sylvanas for giving you a choice no one else would is not reasonable by any means.

I just meant that Sylvanas is a loose cannon, and will need to be either corralled (which would destroy the appeal and authority of her character) or replaced. I figure an extremely angry undead human with unique powers might be the one to remove her. And the human I was talking about was Lilian herself. Guess I should've said ex-human.

What can I say, I'm not a Forsaken fan, and anything that can knock them down a few pegs after their explosion of power and influence is a good thing to me. Maybe some fresh blood, even if its slowly clotting in their veins, would be a good thing for them.

N-Train, I fully agree with you. HOWEVER-- What the OP means by "put a human in control" is that Lillian was a human before death, while Sylvanas was a High Elf.

Confusing, but a necessary fact to consider in the OPs post.

"Everyone has a choice, and their free will is respected."

Except that Lillian apparently didn't understand the choice. She agreed to be brought back to life, not realizing it would be "life" as a Forsaken. In that light, it would make sense for her to be angry with Sylvanas for "tricking" her into becoming what she hated.