As much as I fully agree GEO would be a perfect second Job from CNJ, sadly given Yoshi's admission that the SCH experiment as a second Job for ACN was a failure, I don't think we'll ever see any more second Jobs come off existing classes - instead I think he's going to focus on having 'advanced' Jobs which are standalone and don't require a specific base class in the future, like the new Jobs coming in Heavensward.

Don't worry though, I still love your idea as it's well thought out and would love to see something like it implemented.