I wouldn't necessarily count on spending too much time with the garleans rebuilding to a 'modern' society or getting jobs from it if they do. Jobs tend to relate to new or upcoming areas when they're released.

Ninja with Doma, and the doman refugees who were a plot point in the 2.X patches, and somewhere we eventually went.
The HW jobs with Ishgard, along with Sharlayan for AST in particular.
Ala Mhigo/gyr abania for red mage and hingashi/doma for samurai.
Thavnair for dancer, Bozja for gunbreaker.
Sharlayan and Garlemald for sage and Reaper.

They don't tend to go back to prior areas as mining material for new jobs. I wouldn't say it's impossible, but I wouldn't hold my breath for future garlean jobs coming out past 6.0, when there will also still be new regions and lore to draw inspiration from for jobs.