In my ultra-Modern 12/12 pattern, the ruler of a Sign is in its "Fall" in the next Sign (in Direct-motion). For example, Venus, as ruler of Libra, is in its Fall in Scorpio, and Exalted in Taurus. I'm sure about the Exaltations, but not necessarily about the Falls, in regard to quality of Expression. The QUALITY of Expression COULD be problematic, for a Planet in its Fall.
Anyone with personal experience concerning Venus in Scorpio? I rate it as a strong influence, for better or worse. (In my 12/12, Venus isn't in Detriment in Scorpio.)