1) So did Voljin - to a vastly greater number of demons.
2) Varian was dead the moment he took two blades through the chest. Guldan just finished him off. Voljin was fel poisoned.
3) Both Bolvar and Varian died like little bitches. That's two lossss for Aliance - three if you count Jaina going all emo yet again and taking off in a time of war.