Paladin:
-Passive Trait: gain % of healing received as MP.

Shield Bash OFF the global cooldown.

Warrior:
-Passive Trait: increase damage dealt by 1% per 8% HP missing? I dunno.
OR
-Passive Trait: gain TP when taking damage.

Monk:
Tweak Greased Lightning to fall off per stack instead of all at once?

Chi-Bast (30 second CD?) - deal 100 potency of unaspected damage to target per Greased Lightning stack. Applies some sort of debuff to target?

Dragoon:

Some sort of ground targeted Jump ability, so you can jump to an area without having to need an enemy to target.

Bard

Glorious Anthem Song - Increases the charge rate of the Limit Break meter?

Mending Sonata Song - Increase healing received by a %?