And, like O'Keefe says, she doesn't try to make too much of the evidence we have
That's a constant temptation and a good warning. Aside from checking alternate translations and commentaries to compare different readings, it seems to me that another basic category of check amounts to what Lucretius says in book one about starting from the observational basics about the universe. Taking those observations you then - like a hunting dog or using the light of one step to enlighten another- you sniff out and deduce for yourself what can be supported as unchanging vs what is a matter of opinion that changes with circumstance. I have to think that is what Epicurus himself would say that he was doing.
When we find something that changes as a matter of context we should clearly label it so. That doesn't make it less important to us individually, but it cautions us that we are not a supernatural "God" or "Nature" ourselves. Then we take that into account as we decide what we think is "true" or "right," and what we choose to do about it.
That section in Lucretius about eternal properties of atoms vs accidents/events/emergent properties of bodies, and how they relate to the Trojan War, needs a lot more attention than it has been given.