I ran across the same thing when I was a fresh 15 tank doing sastasha. It's annoying and disheartening that you can't do you're job properly due to DPS and maybe Healers getting aggro all the time.

This isn't an issue now, but I do notice more people rushing instances. Tanks pulling way too many mobs for the healer to deal with initially. DPS and healers pulling mobs for the Tank to tank. Its a mess. This is why I don't queue for DF as a healer. I might keep everyone alive, but that's just too much pressure for what? 1 recommendation? Crafting mat at the end?