I cannot remember where I read it, but they wanted to make doing old raid content harder. If they nerf our health, damage, and heals it will accomplish that goal. Recently I have enjoyed farming the old tier sets from the old raids. If they made it difficult to run ancient content they will lose some people. Those old raids are good for farming gold as well. What would the point be if they just wanted lower numbers and used the exact same percentages based on our current stats? The goal is to nerf us. Time will tell what they decide to do.