Could it work, allowing every class to pair with every job?

[Onri]

For this to work it would take a huge overhaul of the system, particularly for your example above (CNJ+Fairy). I don't see this working from a balance perspective. I never played 1.0 but I believe they had something similar there where any sub could go with any class, forcing very specific builds because it is very difficult to balance this. Look at the original Guild Wars, they allow for any class combos, and they swing the nerf-hammer like they're Thor in a china shop.

[Cerseii]

Well, summon is technically a ACN thing, so as a CNJ, there could be no fairy.

But looking at how minor of a role jobs play (way less than subjobs played in XI), I seriously doubt there's going to be issues with balancing. Worst case (and best) scenario, classes simply perform best with the job they were meant for.

In XI, the time it took to bring a class to 75 was immense (pre-abyssea, compared to what it takes nowadays), and during leveling most of the innovation occurred and was accepted. It doesn't take near as long to bring a class to max level in XIV. So a change like this would be useless.

That doesn't mean I don't think it would be fun. But yeah, I agree now, it's not realistic to suggest this.