To be honest i dont like that SE is trying to make both of tanks the same. PLD has def boost? Let's give the same to WAR. It's worst possible path for this game. I'd like to see so different tank classes so choosing one would be dramatic change to playstyle and whole run style. If PLD is deffense then WAR should offense and self heal all the way. Like classic berserker he should gain from his wounds, Warrios should WANT to be hurt. Only thing i dont like in WAR is that he is actually kinda fuss and kittens now...self healing abilities dont suit warrior at all.
To make it short: both tank classess shuldnt want to be identical copy of other but should want to be as different as they can. The perfect option would be possibility to combo them - war giving buffs to PLD and PLD managin def boost for both of them so only WAR/PLD would be good combo.