Enmity combos were impossible to balance if I recall. That is why they removed DPS stances from tanks and leveled the playing field as much as they could. Save for DRK...it needs some love. That being said though I rarely ever have problem with enmity in dungeons, 24 man, 8 man, savage, or trials. You still have provoke and shirk, which is why they were left in the game for enmity management. The devs still like forcing tank swaps as mechanics or swapping tank busters.

I'm in the camp for good riddance to gradual enmity generation. Now tanks either have it or then don't. I'm free to tank how I want rather then stance dancing like an idiot as it was in SB....forget that crap. This also goes for the DPS, Mage classes. They can go balls out on there DPS and never worry....does anyone remember Diversion? Throttling the DPS is sort of silly, when you have DPS checks or enrages....kinda counter intuitive. Now DPS just goes nuts without ever pulling aggro as long as the tank isn't asleep.