Losing threat when your not supposed to (and using high threat rotation) sounds like a gear difference more than anything. Or your DPS in in the middle of their CD/Burn phase.

The faster stacking Vengeance should help with that, but the auto-threat? Feeling the return of 3.4 5mans (ohai! ima fury war/ret pally/cat, and i'm your tank today!!)

"Losing threat when your not supposed to (and using high threat rotation) sounds like a gear difference more than anything."

I think it comes along with people using high damage rotations in addition to 3 stacks of Luck of the Draw, my complete eschewing of hit/expertise, and a little bit of RNG. This boss pulling occurs less often than the AoE scenarios, but really shouldn't happen at all with the gear I have.

I'm happy about the change though, I play a mage and my GF is my prot pally for every 5-man we run, and even if she has awesome gear, when I'm burning through my CD's at the beginning of a boss fight, it's normal that my threat spikes and I have to go invisible in order for her not to lose aggro. This had become part of my standard rotation, otherwise I would've died plenty of times. Now, this is an extreme case, 'cause we arcane mages produce extreme threat, but she suffered from it and was always on her toes because she thought I would pull any minute. I'm happy she won't have to worry about it anymore. She'll be able to worry about the things that matter in the fight. Of course, this could produce the same crap we had in wrath, like douchy dps pulling before the tank, but they'll get a nice kick from the dungeon if they do that :) so I'm really happy about this and I think we'll have lotsa fun :D

@ trefpoid - "when I'm burning through my CD's at the beginning of a boss fight" - this is your problem