The thank you part is sincere, which you will see if you make it to the end of the post. The content, is a satire of sorts.
Thank you for deciding to make game changes that would require more healing. When team members started barking at us for doing less DPS--we could bark back! It even led to those delicious moments when, for lack of your action, the tank learned that dead tanks can't hold aggro.
Things were getting too easy. Some tanks (the 85 IQ kind) will insist that the next idea isn't true, but we know that the healing workload corresponds to team performance. As the other team members learn to avoid certain pitfalls the healing workload goes down. It could change further still if tanks use defensive buffs and other tricks (sometimes friends carry and use healing potions).
Thank you for letting all those WOW people join our game when they got pissed off at their own game. A wow tank can't help but run two miles straight while their health drops off and then turn a corner (line of sight) because there must be something fun waiting there. Because of genetic anomalies to their cerebrums they can't understand that another member of the team might do something wrong and you have to put healing time into dealing with that.
For all this, I say, "Thank You". because all of this means that every time I queue for a dungeon I get an instant pop to get in. Someone at Disneyworld might have a card that gives them entitlement, but they have to walk all the way to the front of the line for the ride and then wait for a car to arrive. I just push a button and, boom!, I'm sitting in the car.