Some things I would like to see:
-A more whimsical Puppetmaster (that isn't a limited job)
-Mascot from X-2 >w>
-Green Mage
-A job that uses nature magic (seeing as WHM is now a light user now)
-A whip using job
-A crossbow using job
-A job from the Fae on the First
-More rarely used jobs in FF's history or jobs that are unique to characters from past FFs