Imaro
Legend
They don't "need a code of honor to balance their perks". Or shouldn't. The code is there for flavor, verisimilitude, and to integrate them in the campaign world; it should not have anything to do with game balance. All IMO, of course.
This right here... without the code I'm finding it hard to discern the difference between a cleric (martial champion of their deity) or cleric/fighter and a paladin (uhm... more martial champion of their deity???). I guess in 4e they sort of got around this by designating one as a defender and one as a leader in combat... but without the LG code what is the real difference in the archetypes as opposed to combat roles?