Zephyros
... systems are not direct overlays, but speak to important relationships that are informative. Am I getting warm?
Nine of Pentacles, Venus / Virgo, is not really saying "the planet of Venus in the sign of Virgo." Am I starting to get that part right?
In a way, yes. That in itself is a good example. The feminine, loving virtues of Venus coupled with the female potential of Virgo (see the Hermit) together with the middle piller stability of Yesod (the sexual organ) attributed to the feminine Moon. With so many birthing associations, we get Gain, "It purrs with satisfaction at having harvested what it sowed; it rubs its hands and sits at ease. As will be understood from the consideration of the Tens, there is no reaction against satisfaction as there is in the other three suits. One becomes more and more stolid, and feels that "everything is for the best in the best of all possible worlds". The final step before full manifestation in the Ten of Discs.
My guess is that there isn't anything definitive, though. One can play endless mental and emotional gymnastics with these things, which is probably what they are there for.