Blizzard haven't failed. Blizzard are trying to fix a problem created largely (mostly?) by the player base. I have 3 tanks. Druid, Pally, DK. I do not tank in LFD simply because of the random players you get grouped with. I'm done with their attitude problems, I'm done with DPS who refuse to CC, done with DPS that misdirect to the healer and then pull, trying to blackmail me into pulling faster, done with being yelled at, done with all the negative experiences of playing with a random collection of players through LFD. Yeah I know not all players are like that, and I have had some groups I would love to try convince to server change to my server and join my guild, but 9 times out of ten, the players ruin the experience for me. These rewards won't bribe me to change my mind. While I'm sure this work on some of the tank base (those with the thickest skin most probably), I'm sure I'm not alone in saying "Thanks and due credit for trying Blizz, but you're trying to fix a problem that was never your fault to begin with"