Back in the day people speculated the rationale for PLD's DPS output being lower was because of Hallowed and Clemency.

Well, now every tank has enough healing (except DRK) to self-sustain a dungeon boss from start to finish if they wanted and all of them have Hallowed Ground equivalents that work well but with a lower CD. Both of those things means the PLD's clemency and HG do not stand out like they used to meaning there's no reason for a DPS tax on them.

Sword and board is awesome, so why is it that PLD's DPS is still so low compared to the other tanks?