PvP has gone majorly downhill since 2.1

[Sweetgrass]

Back when spells were interrupted by any damage whatsoever, it basically meant only instant-cast spells were usable.

Yet, healers were rarely killed first. The best strat in 4v4 was to fool a healer about your real target, then kill before any healing/CC could be done, which depended a lot on your comp vs the enemy comp. Only at very low skill levels did everyone rushing healers actually work, because of things like Holy, Fluid Aura, Blizzard 2, etc

They can't kill you, you can't kill them. That's balanced.

Not really. Healers are the most valuable roles on the team. Back in 2.1, you could actually lose to a smart healer if you were alone because of Cleric Stance. This skill floor has been COMPLETELY removed when they disabled Cleric Stance/damage interrupts, and PvP is less interesting because of it. The individual doesn't matter, like timing skills to counter other skills, just group up and press buttons.