Predictions for job(s) in the next expansion?

[Archwizard]

Considering that RDM wasn't hinted till 3.4, SAM wasn't hinted at in game until 3.56 and neither GNB nor DNC were hinted at all in game during 4.X, claiming that a role won't happen because it hasn't been hinted at in 5.3 doesn't mean that a job of that type isn't coming.

Oh I'm sure, I'm just saying that it was confirmed that 5.3 contains hints for one of the jobs being introduced next expansion, and I doubt that hint was used on a melee.

Most likely some variation on Chemist with that oddly placed Chirurgeon tangent, and the random NPC in the Weapon storyline who talks about once being a doctor.

I'd be the least surprised if it was some Healer and Caster pair specifically so Alphinaud and Alisaie could swap jobs like the other Scions.

It seems rather arbitrary to split ranged DPS jobs into 'Ranged Physical' and 'Ranged Magical', especially as casters have gained more mobility and rangers got stuck on the same sliding scale of 'selfish DPS vs. party utility' as every other role.

Next DPS should be a melee as we currently have zero jobs in the 'Melee Magical' sub-role

So three things:

1) Isn't it kinda late in the game to introduce a new sub-role? The devs have already confirmed they're trying to even out the ones we have; assuming the current 2 Job limit, they'd need to add a new melee for five out of the next eight expansions (or nothing but melee for at least the next two) to keep up, which would be extremely tiresome with 2 year gaps between each; it would murder hype for expansions. Not to mention that melee DPS are already in the minority within raid comps, and this would increase competition for the slot.
2) Mechanically, what would a Melee Magical role even do differently than Physical Melee DPS? Ranged and Casters at least have distinct LB shapes from each other; Melee have a single-target attack, which is the big reason at least one is kept in raid comps, but it's hard to make a competitive side-grade to that. That's before getting into their role actions to boot...
3) Going back to the first point, the only job I can think of that would fit such a slot would be Rune Fencer (et al). There aren't many other jobs they could make to fill out such a role that aren't already represented by existing jobs like DRK, NIN and RDM.