Here's how I would fix PLD's emnity/dps issues:

1) Move Royal Authority to a 4th combo on both RoH and Goring Blade. Lower damage but gain emnity in Shield Oath and more DPS in Sword Oath. It makes zero sense that their last skill learned at 60 is not based off of both of their combo effects.
2) Change Goring Blade to a frontal AOE cone and remove the DoT effect. Hell, change the name to Goring Blades if you need to, but PLD desperately needs something to help with their AOE threat. Flash and CoS aren't cutting it. Or: change the effect to an AOE in Shield Oath, and a DoT in Sword Oath.
3) Reduce TP costs while in Sword Oath. If PLD isn't going to have anything but an auto-attack then reduce it since the other two tanks have vastly easier times managing their TP than PLD does.

Paladin isn't a bad class, and their TP issues still suck, but as long as damage is king in higher end raids, the other two tanks will always leave them behind until gear can catch up.