Suggestion : Revamp “Crom” as deity choice, and give passive attributes/perks/bonus to players who choose him as god.
“What use to call on him? Little he cares if men live or die. Better to be silent than to call his attention to you; he will send you dooms, not fortune! He is grim and loveless, but at birth he breathes power to strive and slay into a man’s soul. What else shall men ask of the gods?”
Conan speaking of Crom in Queen of the black coast
For the moment, Crom religion is useless. Maybe it’s a way to make a “hard mode”, but i’m pretty sure it’s just an unfinished business or a lazyness proof.
In Howard book, nobody pray to Crom, because he never listen or punish those who call for him. He is more a curse than a real protector. But he gives, at birth, to all Cimmerians, the will to endure life and survive. So choosing Crom as divinity should give some special/passive perks or stats bonus (survival ? endurance ? regeneration ? resistance to corruption or poison ?), and nothing more (no special item, no avatar, maybe an altar to buff the special perks …).
Low-cost change, with no assets to create.
Of course I would need balance, but this change would make it usefull and “lore friendly”, and we would really have “6 religions”.