The overabundant 300p heal OGCDs is what gets me the most - it doesn't even need that much brainpower to design half decent reworks either:

Tanks only have like 6(!) tank buffs: one is shared across, one stronger mit, one special personal buff, one self heal, one party buff - that's it! the rest are dps skills and buffs

Now you could translate it for healers would be like: one shared standard heal (Cure), one stronger heal with splash around the target (Cure III), one special personal buff (think Aquaveil), a self buff (think Presence of Mind), one party mit/heal (Asylum)

The rest of the buttons can basically be dps skills with the other half being job unique to their system:
- WHM pure healing with Lilies
- AST RNG AoE Buffs
- SCH whacky swiss army knife skills like expedient
- SGE kardia dps healing