As I understand it, NWN's Champion of Torm is just the pen & paper game's Divine Champion class, a class intended for champions of all gods good and evil, that has been restricted to a single deity by the game developers. For them it kinda makes some sense, since the campaign was clearly intended for good-leaning characters, but Arelith has more story-telling options than the OC. I think we can all agree that opening the class up to other goodly deities was a step in the right direction, but one that was still a step short of whom the class was intended for - all alignments - and without knowing the history behind the decision to open it up to some but not all deities, the partial restriction just seems kinda arbitrary.
Rather than write an essay, I thought I'd save us all some time and abbreviate some key arguments below:
- It would better reflect pen & paper: Champion of Torm is supposed to be Divine Champion, which exists for all deity alignments in actual D&D
- Haven't really seen any reasona articulated for why it shouldn't be like that
- The "balance" in class options between good and evil in the divine/melee space is off and could be said to favor good: paladins and blackguards kinda cancel (but one could argue not really), and there are both good and evil fighters/clerics/knights etc, but Divine Champs are kind of a (the) stand-out class and only available on the one side
- Big payoff for low cost: I think it would make a number of players happy with little work on your part, and without introducing any new balance issues since it isn't new content
- I'd personally be okay with having Smite Evil replaced with something else or removed entirely (the class is strong without it) if Smite Infidel can't be scripted
- It would be really cool of you
