1- What kind of science major are you?
2 - " for the sake of accurate, precise language" << On this I am not so sure. Elli here likes to remind us that Epicurean philosophy doesn't fit neatly under an "ism" heading, and especially if what is meant by "hedonism" is "pleasure-ism." If we were looking for a larger umbrella term "Nature-ism" or something that is wider would probably be more appropriate, but I bet that is why the ancient followers of Epicurus were just called "Epicureans" since the philosophy has so many facets.
3 - i agree with all you wrote about formulating the categories in clear and appealing ways, but it goes through my mind a lot that there are profound implications of Epicurus demoting "reason" as not one of the elements of the canon, and talking so much instead about "Feeling." I think in the end we are persuaded of anything not so much by a dialectical reasoning exercise but by our personal "Feeling" that a thing is true. Of course that includes our observations through our senses, and also the "feelings" and the "Anticipations" that are part of the canonical faculties. The basic point I am making is that as we approach how best to introduce others to Epicurean thought, we ought to keep in mind that Epicurean thought is NOT a form of dialectical reasoning. Epicurus emphasized the importance of "feeling" (in a very broad sense) so I think we need to give at least as much thought to reaching people through a good "feeling" about the philosophy as we do chopping it up into logical parts. Remember how Lucretius talks about "rimming the cup with honey" as a means of getting across what is in some cases a bitter set of truths? I think that we ought to think about the implications of that perspective.