I wonder the same thing OP. I always thought WAR was a DD class..and PLD was tank. If we have 2 tanking classes why are all the other classes one obvious role? >.> I could see WAR being something of a back up tank...but beyond that...

Its like..BRD can throw in a couple cures to help assist the WHM but if the WHM goes down the BRD should not be able to take over the role of main healing.