How to destroy a fine skill, genius.
That's more or less an issue with enemies not hitting hard enough, but we've seen what happens when enemies hit hard in things like Bardam's Mettle or even Tower of Zot, there's a bit of a freak out. It's not really the fault of the skill, it just benefits pulling massively. Plus again, AoE is only part of the equation and you can't ignore the full picture.
That's a more common one with Shake it Off, that's part of what makes it especially handy with the only big boost to the shield coming at the expensive of your own mitigation. The cooldown is long enough though that it isn't really easy to chain.
Well then good luck seeing more threads on DRK along with Abyssal Drain not getting changed to use up MP instead since it doesn't need it. Funny that you mention burst though since that's what every tank does only GNB has long combo chains, and DRK just empties MP to a certain point. Comes down to preference at that point, I like having my strong tank though, so we can agree to disagree then.