Why are people upset at this? So they're increasing health pools by 300%. Big deal! If that's a real number, then there's nothing to be concerned about. So, to justify everyone's outrage at this, then the "300%" declaration would have to be something like 3,000%.
I can one shot everything in ICC and below and it only takes me a few hits to kill anything in Dragon Soul. I can easily solo Mythic in SoO.
If the Lich King has his health pool increased by 300%, that means I have to push 3-6 buttons before he dies instead of just one. It's not the end of the world!
I didn't find the right solution from the Internet.