There are a few things they could do to make PLD be much better.

1)Up the DPS of Royal Authority slightly and add an additional effect that ups slashing damage
2)Up the DPS of Rage of Halone slightly
3)Add some weak DPS to Flash when under shield oath (maybe sword oath too)
4)Lower Shield Oath's damage dealt down to 10 or 15%
5)While in Shield Oath, all Shield abilities (Shield Swipe, Bash, and Lob) are not affected by Shield Oath's damage down
6)Add an additional buff to Sword Oath (Skill speed buff, Det buff, Crit Hit Buff, and/or a flat damage dealt up %)
7)Reduce Clemency's casting time by a half & possibly reduce the mp cost slightly
8)Reduce the recast on Divine Veil so it can be used more often
9)Add a spike style counter-attack for Sheltron (think Reprisal in XI) when under the effect of Shield Oath
10)Lowering the TP on our main combos (especially Fast Blade) would aid in long fights

I just wish SE would show some more signs in balancing PLD