The really Dark Path got removed because the scale of SG is so much bigger now.
[...]
And then adding a Dark path on top would just blow it out of proportion. As you probably only want to be bad sometimes or to specific people (Which is more or less already in the game.) And being bad to
Person X, changes how
Person Y perceives you. And then it influences
Person B and
C but not
Person O cause you were nice to
Person L.
And I don't want to ruin my mental health with the clusterfuck the Dark path would add.

[...]
And also my vision of SG changed over the years. The beginning still had a very big lewd focus (Dark path, corruption, etc.) and it changed more to being a Love-story. (Romance, etc.)
You'll still get the chance to corrupt some people to a certain degree if you really want. (Dirtier fetishes, etc.)
Time will tell.