Venus and Jupiter are benefics, but they don't always help. Benefics in detriment or fall can be very harmful, indeed. Aspects to planets are in general just as you say, using the general meanings (Mercury for communications; Saturn for blockages, etc); but again, not always.
I don't think there is a safe way to generalize Moon-to-planet aspects without a context. If you are looking for the Moon to translate light from one planet to another, but the Moon aspects a third planet first, that is impedition, for example; and that impedition will 'mean' whatever it means within the context of the question: a person, a communication, illness, a different job, or whatever, gets in the way of the perfecting aspect.
I suppose it is helpful to first understand the meanings and implications of planets in and of themselves: what they rule, what their colours are, what illnesses they signify, what body type, etc. etc...but again, all of these have to be translated from chart-to-chart, depending on what that chart is about.
What is probably most helpful in understanding how the Moon works in the way you have asked, is to get a good, modern-English version of Lilly's Christian Astrology
, and read Lilly's charts. They provide excellent examples of what planets 'mean' in aspect to the Moon, within the context of the question...context being key to everything.