We had this system in the first part but we refused using it since it causes many bugs when players enable and disable the filter at any moment.
And how do you advance in the story without losing any content? Because if I chose to keep it disabled, I don't have content with Kate and if it's active, it has content that I don't see because it's enabled, how can this be resolved? And why not have a program that, if the player wanted futa-futa, automatically activates and deactivates this function?