I can't say that I'm really excited about the prospect of any potential new jobs, because...

1) DPS-ing is still fun, but the ratio of DPS jobs to tanks and healers is already ridiculous.
2) Healing and tanking are no longer fun, and are super-homogenised, so I don't know that it would mean all that much if they added another job to share in the misery.
3) BLU makes a convincing case against the desirability of limited jobs.
3) The current lineup satisfies most of the job fantasies that I can really conceive of as working within the FFXIV universe.