I've taken a few missions in Grimeyvault now, the one that has the look of tattered curtains for doors and torches on the walls. Anyhow, in these missions mobs will aggro from ALL over the mission area. I can be fighting a mob in the front hallway and have something four or five rooms removed aggro and come speeding into the room. And during several of these occassions the mob falls to the ground giving NO xp reward, or even message that you can loot the remains. As it is hitting the floor it is already starting to fade out even. The aggro issue is my prime concern, I've had this do a chain reaction of sorts a couple of times that results in 10 or more aggro message from different mobs...