Earlier today -way earlier, don't ask- I finished the Wrathgate questline, which included the cutscene and it's subsequent follow-up.
I like the complexity and depth of the characters portrayed -not necessarily in the cutscene, which is pretty standard, but in the events following the cutscene. I was already predisposed to like Thrall, but his pathos after the confrontation with Varian Wynn and Jaina's intervention is very cutting. His discussion with Saurfang about the dashing of his hopes and dreams for his people reveals more layers underneath him than what you'd expect, and you can see now why he rules from the Valley of Wisdom in Orgrimmar. By comparison, Sylvanas is motivated by hatred, grief, and the desire for vengeance. Those blind spots enabled her to be unwittingly manipulated by Varimathras, and instead of learning wisdom this experience seems to have fueled her desires further. Varian Wynn and Jaina are the most stereotypical of the four main characters (not counting Varimathras), with Varian's overt racism providing the kindling for the destruction of the tentative collaboration between Horde and Alliance in Northrend.
The push in Northrend now seems to take a more desperate tone, as Arthas proved in the cutscene he is still the master of all. Only the Blight is the potential game changer that the Alliance and Horde can use, and that has been taken from them by the betrayal of the Apothecaries.
I'm now really curious how the subsequent quests will play out, given all that has happened in the interim.