I just finished levelling everything to 80, and as part of that saw all the job quests.
It's odd - I came to the conclusion that SE decided partway through development to axe the traditional job quest series.
Some jobs - Scholar most notably - had major important plot developments, a quest beyond "talk to this guy then this guy then you're done", and so on.
Others seemed to be brief comedy sketches - NIN most notably.
And some were like - "hey, remember what you did at 70? Square-Enix remembers" - like SAM.

The role quests were really well done; I can't decide myself if the job quests as is are better than having nothing at all, though.