This is such a bullshit answer. It was common knowledge amongst the players. I never heard a peep until I started raiding it and thought, that was a little too easy, maybe I should talk to some of the dev's to see if this is intended.
If you, as a player, come across something that doesn't seem balanced you should say something. The Devs, GM's, Admins have lives as well and we don't have 80 hours a week to sit and watch and analyze every aspect of the game which is why we rely on player feedback.
If this is "common knowledge" for the past few years, then it's evident people were like: "Hey this is pretty easy and not right, lets farm it out first then say something."
I know this is the case because anytime I find something that feel is not right, I say something, then it gets fixed and my guild gets pissed at me because they look at it as a "nerf"
You can't cry game balance after you've done the content 100 times and are done with it.