They're not animals.
They're still people.
Karma should still be in place.
Makes no sense to not gain good karma for putting a feral ghoul out of it's misery or a Fiend who raqes and tortures people for fun.
If you don't wanna gain it then don't kill them.
Simply sneak around them or something.
So you think it makes sense to have players have to take the SNEAK skill, regardless of their build, to sneak around hostile mobs, because their character is evil and they wouldn't want to have to gain karma for killing things? So, it's ok to not have large swaths of the map available to evil characters because they must turn and run, or skirt miles of territory, just to avoid gaining karma by killing things?
I just want to get it right - that
this immersion-destroying waste of time and energy is what you think is the most fair and sensible implementation ... not simply removing karma gains on a few creatures that weren't there in the previous title? Right.
I'm not even considering how good/evil it is, how sound the justification or rationale to kill a Ghoul or Fiend is, because the karma system is not even nuanced enough to handle complex ideas ... I'm just talking about the gameplay ramifications.