Did this with Shadowbringers, thought it'd be fun to do it again.
White Mage
-Dia
-Benison 1
-An unknown Ability (Blue swirl), but has the usual Lily Cast animation.
-Glare 2. It sounds bangier. Hard to tell with the way they queue abilities for these, but the cast time looks like 2.0.
-Benison 2
-The highest burst negative DPS spell in the game.
-Placeable, pulsable, aoe healing.
-Glare 2.
-Heart of Water
-The unknown ability from before.
-Holy 2.
An odd showing. No regular Lilies were consumed, which makes the no-context unknown ability even more no-contexty.
Scholar
-Whispering Dawn
-Recitation + Adlo.
-Deployment.
-Blessing
-Chain Strat
-Biolysis
-Red Broil
So basically nothing new up to this point.
-Some OGCD skill. Looks like a barrier.
-A party wide movement speed increase.
-Walks up to the enemy like a champ.
-Art of War Volume Two. Volume Tzu.
Well, at least Summoner looks hype.
Astrologian
-Earthly Star
-Divination, no seals consumed.
-Combust
-Ally buff
-Malefic Upgrade
-No context AoE skill. Looks like Lord/Lady get their own slot / draw.
-Draw, redraw, play, Lady, No Context AoE skill.
-Seals consumed for a self buff.
-Mega Gravity
-Starfall. No idea what it does.
-A targeted shield with an additional heal effect.
Interesting implications. You clearly aren't guaranteed seals for your self buff - Perhaps you gain more enhanced spell effects based on the seals in question - Or maybe you can't duplicate, so have fun with your RNG.
Sage
-Cure. Even has 1.5s cast time
-Aetherflow. Poor Scholar.
-Enhance Next Spell skill.
-Instant cast Barrier GCD
-Some sort of no context ally OGCD. 1 aetherflow
-SQUARES
-Gauge charges over time. Aetherflow for instant charges.
-Spending Flow Grants Purpleflow.
-Standard nuke gcd?
-Enhance Next Spell
-DoT effect? also TRIANGLES
-Medica
-Enhance spell
-SHIELD medica.
-Spend Purpleflow for X-FIRE
-C U B E
-I'MA FIRIN' MY LASER
-Only losers walk up to their enemies.
-Fine Art of War
-Laser Dance
The New job would obviously get more screen time. There's a spell enhancing effect here, a better Lily System for healing and dealing damage with OGCDs. Not every Lily spent gave a Purpleflow, so, it may be unrelated.
Multiple damaging abilities but no specifics means we can only guess how they're utilized. Imagining hyperbeam is not spammable.
The implication of the spell enhancement is that you have a very basic kit (Cure, Medica, Nuke) and you have a limited amount of enhanceable spells. Perhaps 1 charge per Noulith and they refresh over time or other conditions. All of the shown GCDs have a spell cast, except those preceded by the Spell Enhancer.
So Nuke -> DoT enhance, Cure -> Single Shield Enhance, Medica -> Shieldica enhance.