Didn't do anything? It was hot and gave another incentive to go the dominant route.To quote what I've said before:
"The rape had no long lasting effects that weren't completely overridden by using just 1 Doze. You could rape Ava until she stops responding to you and avoided you but soon as you Dosed her, it was like you never touched her. Westane looked at the system and thought about expanding it BUT that meant having to build a system that goes completely against the core system of Dosing people.
So he removed it because it couldn't be expanded well enough and it also it didn't really DO anything.
It's not coming back. "