Well, the big problem with PLD is that many of its abilities are situational. If you have your perfect farm run, you really will just do 123 most of the time. However, things like Cover, Tempered Will, and Awareness all rapidly fluctuate from being life saving to literally useless depending on what's going on at a given moment. The real depth of PLD is using the fact that you're just doing 123 to be hyper aware of the battlefield and spot when your situational moves will actually be helpful. I think it's possible that between the tanks, a PLD was developed to be the "raid leader" more than the WAR was. That is, if you subscribe to the notion that Tanks are the natural leader(s) of a party