I disagree with the reasoning, although the conclusion is the same.
WAR's ability to self heal is better than PLD's mitigation and self healing (who's retarded idea was a 2s cast time???).
Both mitigate well enough, assuming equal and adequate gear.
Deliverance kicks SwO so much because of not only what it does for the job itself, but the other abilities that it gives the warrior access to.
What does PLD get in sword oath? Wet noodle b*tch slap potency added auto attacks. Pair that with a distinct lack of aoe damage - vital to clearing trash pulls - and PLD is left by the way side as the clearly inferior tank.