Some good stuff there and it concerns exactly what we are discussing in Episode 246 of the podcast which is of such importance.
"What this suggests, and what in fact we have independent reason to think, is that on Epicurus’ view, once one is in a position adequately to explain sense-perception, one will then also be in a position to work out an explanation of intellectual cognition, by appropriately extending the explanation of sense-perception."
I think that's probably right, and again it points to the central role of reasoning about the IMperceptible based on what IS perceptible. That's how we conclude atoms exist, and no doubt it relates to how Epicurus concluded "gods" exist, but it also answers the charges that skeptics like Cotta raised as to why an Epicurean (if he indeed bases all reasoning on sense experience) would not rule out the possibility of existence of oceans if he had never seen one in the past.
The references cited in the article may be helpful in summing up the answers to that charge, and will allow us to make more clear why the single term "empiricist" does not fully describe Epicurus' method of thinking.