Pld is one of the hardest jobs to fix at the moment. There's really no need for a tank. Even prior to Abyssea having a Pld was more or less a safety net against bad stuff from happening. I'm not hating on the job either. I love it have it leveled but tanks are just next to impossible to make useful unless you either nerf melee damage enmity and/or make melee take way more damage. That would make a lot of angry people I would think.

The other option is to buff Pld but how? Make it do more damage or heal more? Then it outclasses other jobs that sole function is to damage or heal. It's very hard to do with keeping balance.