Please do not lock Jobs to the Weapon Class that unlocks them.

[Cairdeas]

true, but the trademark weapon of thief has always been daggers and regardless of lore, in FFXIV, the weapon makes all of the difference. I thought this was obvious, but apparently not.

I think your still trying to confuse Weapon Classes (What Weapon you equip) with Jobs (What role you play in a fight)

They are not the same things, they are not even on the same level. Thats why Jobs are their own system and Armoury is its own system.

Right now with the Armoury it is up to the player to define their playstyle for their Weapon class. A Thaumaturge can tank in the right circumstances, so can a Marauder, A Lancer, and a Pugilist. They might not be the best at it but they can do it in a pinch.

The Job System lets you unlock a Title (Paladin) that says. "I'm a Tank. Don't worry about what weapon I have equipped, I'll protect you from harm." After that point the weapon no longer matters your Specialized by your Job to be a tank.