I wouldn't want some jobs to be based off of certain old ones just because of the stigma that they may have (check out the Dragoon Pet poll thread if you don't know what I mean). Red Mage is a rather loaded job so I would much rather Mystic Knight (think Genesis of crisis core), nearly if not the same class from the past, but it's not so weighted down by tradition.

The same goes for Ninja. Ninja is not only loaded but it's rather specific. So instead I would want Assassin.

I want Dragoner, Corsair or Sky Pirate, and Samurai/Ronin also very much.