If anyone has ever played FFV, my suggestion is to keep the armoury system and use your current physical level as the "Bare" job level. Bare would still be fully customizable in every way, but jobs would also be implemented that are not customizable. To make the other jobs worth having they will be stronger than Bare is at the beginning, but as with FFV when you master various jobs Bare will actually get hardwired stat bonuses. For instance reaching certain levels in the Paladin job would give Bare permanent defense increases.

In this way you would still have the armory system to use completely with Bare, but with the other jobs you would only be able to equip job specific weapons. That said, once you have ranked up in a weapon class that weapon class would remain ranked up. So the system would look like this:

Jobs Classes that get major bonuses
Bare Any
Warrior Any DoW
Monk Pugilist or a Stave Based Class
Thief A Dagger based class or Gladiator
Red Mage Gladiator, Conjurer, Thaumaturge, a dagger based class
White Mage Thaumaturge, Conjurer
Black Mage Thaumaturge, Conjurer
etc.

While some jobs may have a lesser amount of classes that they receive bonuses for, they would correspondingly be more specialized to those classes. Each job would have it's own skills/spells, and if they same spells were received from the class the job is in then that spell will receive a major potency increase (for instance a whitemage conjurer who is high enough in both job and class to have learned cure will have a much more potent cure.)

This is just an idea I had. While I doubt this is the system that will get implemented, it is still a cool idea. The great part about FFV was that once you mastered all of the jobs you could switch back to the Bare (jobless) job and create a custom character that had higher stats than any other job because of the bonuses. By adding traits like WHM and BLM to Bare and equipping powerful weapons you could essentially be a powerful caster with good gear. The potential for the same is present in this game, and I love it. No longer do warriors have to go without magic and mages have to go without armor. They may not be at full potential in either one, but a mage can still swing a weapon and a warrior can still throw a fireball. Imagine if summoner is added as well... You could go back to normal physical levels, make a balanced character, put some powerful summons in as abilities, add a few buffs and heals, then wear high def/vit armor and equip a bow to do damage from afar... The possibilities are endless.