This is a bit of a misnomer, they are not really fixes, as in fixing bugs, but rather diminishing the difficulty of some boss fights. Anyone who reads wow.com or mmo-champion.com has already seen this. For me, I am still digesting and wondering what is going on. We already received a buff to the instance on all three fronts; more health, more damage, and more healing. Now, we are receiving nerfs that are about to completely trivialize the encounters, or at least some of them.
Lets examine the Lord Marrowgar encounter for instance; I was rather pleased when there were aspects to the fight that involved more on my part, than just standing in one spot and going round and around my tanking rotation. For one, I had to continuously dodge the cold flames. Second, I have to work together with my fellow tank, always sync our movements when dodging the flames. Thirdly, was my responsibility to taunt the boss after each bladestorm.
Except, now the bladestorm no longer resets aggro, which means I can just stand still during the storm and resume randomly smashing buttons when he returns to me. I understand that there are many fights in the instances that represent a significant challenge to players, but this is not one of them. I have seen tanks fail at aggroing the boss after a bladestorm and each time, I would wonder where they learned to play.
It is the easiest thing in the world, just dodge the coldflames and be within taunting range of the boss when the storm fades, and watch the DBM timer. Since taunts are effective for three seconds, you need only wait until there is less than three seconds on the timer and hit taunt. I promise, if you are not a horrible tank, you will have no problems resuming and building aggro on the boss, thanks to that taunt and neither a healer or any dps are in danger of being killed.
Another nerf to make tanking almost trivial is on Rotface, where as part of the excitement was that Mutated Infections arrive faster and faster as the fight progresses, making finishing the fight a fun challenge. Now, that speed no longer exists, at least not to an extent and running around the room with a goo behind you, seems no longer very exciting.
There are not a whole many tanking challenges in this instance, if you really begin counting them. Mostly it is about switching aggroes via taunt at certain stacks, which is conveniently eased by the use of DBM. Encounters like Rotface make tanking a joy, when you really have to do something and focus on execution. I was delighted the first time I did Rotface, as the mechanic was something new and fun for me.
At least I can hope Blizzard can refrain from nerfing Icecrown Citadel any further. Just ignore the moans about difficult it is. People who complain about it, obviously do not know how to appreciate it properly. They just want to run in, faceroll a bunch of stuff and come out bragging they killed the Lich King.
For full source of the changes, read the blue.