I do somewhat second this, but I also think it might be fine to have there be actual perks to being a bastard/murder/thief. This however requires an adequate risk, and how to go about creating such in a game where you can simply savescum (which btw I think should be possible) I do not know.
You could also create other rewards for good/lawful characters. Perhaps one could imagine that a goodhearted character is able to take on missions that others cannot? Helping their fellow man out. Maybe you could have an event where any person who has stolen X value things or gained X exp from murder is robbed/wounded and suffers a penalty? Just ideas, from the top of my head, but I do think the gap between good and evil is to great in the risk/reward sector.
