Why does sylvanas in any way need a redemption arc?Garrosh was awful and I'll never understand how anyone liked him. His mental instability wasn't at all sudden, it was telegraphed from the start. He spent most of his life in Nagrand crying about how pointless everything was, then suddenly in Wrath he is all "Me orc smash, me hate alliance even though I just heard about you five minutes ago" and it just goes down hill from there until he goes out crying about how it was everyone's fault but his. He should have never left Outland let alone be put in command of anything more important than Peons.
I like Sylvanas, hope she gets a huge redemption and leads the Horde into a brighter more prosperous future just to piss off her haters.