A job utilising carbuncles: possible?

[AlexiosCalisthenes]

"No plans to do this as this is the image of the Arcanist." Essentially. What they didn't state that people figured out is Egis are designed to be "skinned" over Carbuncle, basically Carbuncle is the "class" and the Egi is the "job" - So there's a carbuncle for every Egi which means they would have to redo the system in place to allow Carbuncle to be used on SMN for example.

If it is skinned over, then it should just be a case of reapplying the Carbuncle art layer since the skills and increased potency is already in place. I'm not sure how that involves - in your words - redoing the system.