I'm not going to level a generic-ass fencer to 50 and glad to 50 to play red mage, and having the ability to level "template" jobs to 50 alongside FF archetype jobs screams imbalance and painfully role-less jobs and redundancy.
I just don't see this generic old path fitting with the new one very well unless Monk isn't even a job you level up on.
They're going to have a hard enough time finding real purpose to these old generic jobs once Classics show up without adding 10 more generic ones. It's simply not fun levelling a template and a no-name no-lore generic MMO creation.
Elementalist.
Soothsayer.
Barbarian.
Nightstalker.
Do not care. Final Fantasy.