I don't see why BLM must be OP in every fight, melees aren't; and BLM don't care about that do they? that's why in 1.0, in some fights you weren't welcome, unless you were BLM.
It's silly notion that BLM should always be able to do 2x damage, because there should always be some enemy around, with elemental weakness...Why not ask for all mobs to be weak to piercing damage, so DRG by default can do 2x damage on them? or to swords, so GLD can always do 2x damage, since they are so weak anyways.
I get it BLM is top damage dealer, but they do a lot of damage even without weaknesses.