Hey, how about some QTE where targets are popping all over the screen and you'd have to quickly click on them while they're over a specific area of the screen. They could either be static and fading in/out or moving around, there also could be some "trap" target that would give you a negative effect if you click on them.
This could actually be used both for combat and for lewd events, for instance click on the target while they're over a weak point (e.g. on the face/body and not on the shield/armor) and in lewd events you'd have to click while they're over a specific area that needs to be kissed/worshiped/whatever (ass,foot,boobs,...)
Improving and adding stuff to the existing QTE might be cool too, for instance a direction arrow would become a ? after a small amount of time forcing you to memorize the QTE combination.