Well as long as everyone understands that aggro isn't just the tanks job, it's everyones responsibility then I'm sure we're all on the same page. If a healer is pulling hate due to hate creep (and the tank isn't terrible) then they're either over healing like it's going out of fashion or the pull was messy and one mob is outside AoE enmity range, which isn't always the tanks fault. I had a healer in Dusk Vigil yesterday who was still using Fluid Aura and with some mobs having ranged attacks it was a pain in the ass. Sometimes a DPS just cannot wait for the tank to LoS pull so they pull a mob away from the pack mid pull, defeating the whole purpose of LoS pulling in the first place.

Work with the tank, not against him and you'll have an easier time but as a healer if you're pulling hate before the DPS then not only could enmity be better managed but your DPS are poor as well, healers don't get anywhere near DPS hate levels normally. Well, not unless you're one of those super DPS healers but I've heard that's not possible, which is odd because I see them all the time, even in DF.