I've always been a sucker for great swords, so the answer is yes, I'll be switching from PLD to DRK.

MNK is staying at the moment, have no interest being a coward who hides behind a spear or at range. If I'm going to do damage, it's going to be in their face punching their teeth out.

I'm not sure about AST though. Right now my primary healer is WHM. I'll see what they bring to the table before I make my choice.