No more Detect Good. Detect Holy instead.

[hamishspence]

except these restrictions aren't equal are they? Clerics can be literally any alignment, the rest is just making up a god to match it.

Yes - but if they change to an alignment disallowed by that god - they lose their powers, and they have to either atone or find a different god to worship.

Plus, in some settings, you don't get to "make up a god" or "make up an ideal to follow" - you have to use one of the existing ones.

Finding a different god to worship may involve getting an atonement spell, or a quest from another cleric of that god, to prove eagerness to worship the new one and convince them that they won't defect again.