What are the biggest gameplay changes with Kunark?

[Mojorisin]

I think disciplines are introduced, and taunt will work on higher con mobs. That's all I got.

[SwordNboard]

Aside from the obvious and previously stated, there is a small thing I'd like to point out. The dungeon design changed a bit with Kunark with more fatally positioned patrols and more named mobs that actually take a strong trio or group.