To tell the truth they probably purposely pushed Jobs back, and I am glad they did. With all the other content and changes being released there would have been no way that a 1.19 Job system would be as robust and worthwhile as any of us want it to be. Think about it, the job system required the development of new armor, skills, weapons, spells, quests, UI elements, all of which must be balanced and polished for each of the new jobs they add. It really is not fair to demand that Jobs be something super meaningful while at the same time complain that they are not coming out as soon as possible. With all the other battle system changes and content being added I think we will have enough to hold us over.
On another note, I just realized having a unique action bar overlay for each job ala what KH2 had (for worlds) would be pretty cool.