Whoever think that tank is useless in terms of PvE gameplay (solely endgame) have no idea how the class actually works and can't adjust their gameplay to the current standards.
Sincerely sick and tired of people complaining about the class balance when majority of people giving out opinions on forums prove in one or other context that they can't even properly use the class advantages in any sort of gameplay.
Start finally think for yourselves when it comes to the gameplay instead of constantly complaining about one thing or another saying that I quote "this and that is useless because I *fill in the wrong itemization/build/skill order/pet usage/class cooperation excuse* and it needs to be buffed".
Game's not that hard, honestly.