to those that want more Gul'Dan development - read/listen the audiodrama
its honestly pretty amazing, the decision Gul'Dan takes at the end and his thoughts then - fascinating .. as well as his dialogues with KJ
For me the audio dramas were some of Blizzards best work. I don’t want Gul’Dan to die, I want to see KJ get his revenge on him for making him wait in the Tomb of Sargeras. Please Blizz –don’t do another Kael’thas with him.