PLD has enough of its own mitigation. I'd like so see the following changes
1) Shield oath applies 100% fast cast and no combo interrupt for spells.
2) Bulwark blocks restore TP (probably done through a trait) which would make it similar to 1.2's Outmaneuver. Perhaps the smaller the shield size, the more TP restored. This would make kite the balanced (as is), towers the high mitigation (as is. Sheltron OP) and bucklers the offensive shield due to a lack of TP problems.
3) An ability which enables a duration for both Sword Oath and Shield Oath to be active. Something like this would be very nice to have for an opener.

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4) MAYBE carry over Fealty from XI PLD's toolkit. The ability to say RIP Death Sentence's infirmity effect or ignore one of Living Liquid's blunt stacks would be really sweet.