Good.
Illidan's death was utter shit. Illidan's entire backstory is centered around Malfurion, Tyrande, the Legion, and his thirst for power. In Burning Crusade, he starts attacking Shattrath and we are given no reason why. There was no reveal that 'oh, he was doing it to become more powerful so he can destroy the legion!" or anything. He just went 'insane', despite the fact that there also is no real proof that he went insane other than Blizzard's word. They just threw him in there because he was a big name. The storytelling was horrible.
To top it all off, Illidan is killed by Maiev and Akama. Are you kidding me? His jailer and a dude no one even cares about. Why was Malfurion (i know Furion was in the nightmare) or Tyrande not there ? That would have tied up all loose ends in his story. But Blizzard butchered him.