As an aside : the whole argument that the slayers have upset the balance and Twilight's aim to repair it by sacrificing them for the greater good makes him redeemable - reminds me a lot of a rather fascinating fanfic I just read entitled Necessary Evils by lj user rarhirah. In it, Willow's bringing Buffy back, along with Spike changing sides has upset the balance, so Willow chooses to power up/join forces with the First Evil to set the balance straight. To do so, she has to kill Dawn and Buffy - which is a small price to pay for saving the world. She surrounds herself with the First's minions and demons, also kills people - justifying her actions - stating that it is for the greater good. She is saving billions of lives. But the truth is she's getting off on being the one to do it, her pride (hubris) and the desire for power (which she now has in spades) is blinding her to what she is actually doing, so she does not see that there is another way. Twilight apparently is doing the exact same thing.
( Where in the frigging hell is Spike? An argument for Spike's importance in the Buffy S8 arc, spoilers on the Twilight reveal and for S8 Buffy. )
( Where in the frigging hell is Spike? An argument for Spike's importance in the Buffy S8 arc, spoilers on the Twilight reveal and for S8 Buffy. )