Hi,
Something similar to how you form kickdrums in Audija KickDrum or have pitch/key defined envelope stages in Exacoustics Ghost could be very interesting as a modulator in FilterVerse. As many (if not all?) filter types in FilterVerse allow the cutoff to be defined as a key, I think this proposed modulation type could open the doors to a lot of new and interesting options for sound manipulation.
Best regards,
Simon