You don't know what jobs they will be releasing when it's finalized. All you saw was concept art for Black Mage and Evil Armor (Dark Knight) which doesn't equal what will be released when it's finished. BLM is a safe assumption, but DRK is really up in the air.
The head ache attached to discussions like these are that they are not entirely rational and contradict what the basis of their planning is. They are keeping the armory system, therefor, the weapons are locked. Jobs are just an extension of the classes.