Although he takes it in a different direction than I would, Seth over at Kobold Enterprises touched on an idea I’ve been mulling over a little bit when he posted about recasting Divine Domains as “schools” of magic, the way arcanists have transmutation or divination. He wants to set up pre-made spell lists and boils the domains down to a core of 8, which isn’t really the sort of thing I’m interested in.
Rather, what struck me about divine magic was this: Clerics (and Paldins, etc.) are tied to a given god (or allegedly a pantheon or idea, though I’ve never seen a good explanation on how that should be implemented). They must be within one step of their diety’s alignment (a LG god can have LG, LN, and NG clerics, etc). Depending on alignment (on the Good/Evil axis), they can Channel either positive or negative energy, and spontaneously cast either Cure or Inflict spells. What this means is that a Priest of Zeus, a Priest of Hades, a Priest of Poseidon, and a Priest of Kronos all look exactly alike, with the possibility of a small variation based on good/evil. It doesn’t matter that Zeus commands weather, Hades death, Poseidon the seas, and Kronos time — each cleric has access to the same spells (Bless, Compel Hostility, Cause Fear, Detect Undead, Enthrall, Raise Dead, etc).
I would like to recast (or maybe ‘fracture’) the Cleric Spell List so that Clerics only gain access to spells that are relevant to their deity’s domains. Divine Spells are already marked with arcanist-style schools, and that might be a good place to start, but gods deal in domains, not schools, and a God of Love and a God of Deceit may both have Enchantment spells but probably shouldn’t have the same spells.
I think there may be some common core, spells that are iconic for the class (Cleric vs Paladin vs etc.) but I’m not entirely sure of that (it’s easier to concieve of spells that match all paladins than ones that match all clerics, I think).