Even without subjobs I am sure there will be specific things that you CAN obtain or do with a job, but don't necessarily have to.
Instead it will be like "you better have 'random item' equipped or you are a noob!"
We'll have to wait and see though. But I am sure there will be a 'norm' and a 'wtf?' just like in FFXI (yes I am talking about people that go whm/thf... you know who you are)
95THF, 95DRG, 90BRD, 94BLM, 95BLU, 90COR - Retired: Nov 2011
Someday soon my friends, this ride will come to and end, and we can't just get in line again.