[DEV Question] Can we split it?

[Sylve]

I believe SE has stated that, at some point, they'd like to get rid of classes entirely and just have jobs. Maybe we'll see that in 5.0. Or later. Or never. Either way it'd resolve the matter, though I'd be curious to see how the 1-30 leveling experience would change, and especially how the lore would change to adapt. Imagine starting White Mage at level 1.

Quite likely the lore wouldn't change. As far as the story is concerned, You'd be a Conjurer doing things for the Conjurer Guild until you 'learned' enough to be called a White Mage. There is no mechanical difference between CNJ and WHM, So nothing would need to truly change outside of perhaps modifying some quest dialogues here and there.
Same for other Class/Jobs with their intro quests. A Gladiator for example, could be a 'Paladin in training' and have the NPCs reference such in dialogue.