Anyways, I think the BTS great! The scenario is quite intriguing (and tearjerking). We get to see Anduin being competent enough to consult his fellow leaders, touring the nations, and sticking to his dream even in the face of adversity. Exploration of what it's like to be a Forsaken, some action intra-faction turmoil with the Council, Genn gets development, Nathanos isn't a complete jerk anymore, and the field event is fantastic. I'd love to see a cutscene, ingame quest, or a machinima based off of it. Only real downside is that it reinforces Sylvanas as a Stalin-esque dictator with zero redeeming qualities, and makes the rest of the Horde look bad by association.
I'm indifferent to the light-resurrection, as the Light's supernatural abilities have always been a given. I'm more worried about how they're continuing to twist the Light into yet another "is actually morally greeeey and isn't as good as it seems!" ordeal.