Said it before, I'll say it again. I'll accept provided she takes over as the final boss. She turns Anduin and then uses him to usurp the Jailer once she figures that maybe the giant blue man who ditches his followers and runs a reality-wide torture dimension and is literally named after imprisonment won't actually save her or anyone else's soul. She gets to be legit about what she tries to accomplish, so is 'redeemed' in the eyes of the only ones to whom she requires a redemption, i.e the Forsaken and parts of the Horde - she's still evil and a raid boss, so people who want to off her get to off her in what will likely be a solid boss fight and both sides get to be happy that Anduin didn't talk her into being a better person.
And yes, this Anduin is entertaining to watch. No real complaints about the cinematic by itself.