As I and many other people have stated the core of PLD needs to drastically change. Personal mitigation is a moot point in a game where the developers are obviously biased against healer DPS, where fights have scripted burst damage that are planned for, and where all tanks have the ability to survive every encounter.

This leaves the tank with utility. DPS in FF (and all MMOs) is a MAJOR utility. PLD needs to be brought up to speed in this category and this category only, the question is in which way it needs to be done. Whether it be increased DPS through raid buffs (i.e Battle Litany-esque move), major debuffs placed on the boss to significantly decrease raidwide damage (Storms Path), or massive personal self heals (if Clemecy was a HoT) the core of PLD's "I can mitigate slightly better and easier than the other tanks" design is what needs to change.

At the end of the day nobody give a shit how much less damage was taken by one tank to the next as long as they both survived.