chaos knights who want to change their ways..
It may be a bit early for this feature request, because there may be aspects that haven't been discovered yet. Nonetheless..
I'm actually starting to think that the way it is now, converting to N or L (at least temporarily) is almost mandatory from a gaming perspective. The advantages are huge and the disadvantage can be worked around (if you are tough enough you don't take damage). Doing so takes a lot of boring work (saccing some 200 goldpieces one by one), without being challenging. That's not a good thing to force players to do. The fact that converting away from C is difficult is great and should of course stay, but preferably in a way that is more engaging and less rough on your keyboard. Ideas, anyone?
I was thinking that perhaps an NPC could have mercy and offer you a chance at redeeming your soul. Game wise, this could perhaps take the shape of some quest that offers a whip* as reward, which you can use on yourself to change your ways? Ideally, I would love to see some storyline that explains why your chaos knight would convert himself and makes it less of a choir and more of a challenge in-game.
*: preferably a whip with good damage in case the player has innate PV or the Scales corruption. A lawful whip of mayhem, maybe?
edit: or, an ordinary whip and a whole set of items with negative PV? :-)
edit2: Never mind the whip idea, it's more mind numbing than saccing at an altar, at least the way it works currently.
edit3: A different idea which has been raised is to make their class powers less effective or even disable them altogether when they change alignment.