My only issue with loot reservation is that if someone wants MNK gear... they should be able to clear that raid/trial/whatever on that job. If you can't because you are still gearing up that class... then do it with your FC. Or at a bare minimum, if WHM gear is reserved for the DRG who can't be bothered actually healing the fight, if another WHM joins via PF, they should greed against each other. At least that is reasonable.