Probably mentioned before but a real problem for PLDs is the enormous difference between one with Ochain or Aegis and one without. The vastly superior block rate alone ensures that with either of those shields they're miles ahead.

Aegis in particular. Any job can easily cap normal MDT(50%) but only with that shield can they get it to 90% (may aswell be immune to all magic). The Aegis PLD we use for Voidwatch can even tank the T4s weakened with no problem, anything else would just get one-shotted.

Something to close the gap somewhat is probably needed.