This is exactly why I'm in the "idealist" camp when it comes to this topic.
I find it hard to fathom that Epicurus really posited atomic beings existing outside his kosmos, between world-systems. Remember, the stars we see are part of our kosmos. The "intermundia" has no world, no stars, no moons. It is, as far as I can determine, an undefined soup of random atoms that haven't coalesced into an orderly kosmos. I see no way an atomic material being would even have a place to stand in such a region of the Universe!
Epicurus did posit "alien" life elsewhere in the Universe, but they lived in their own cosmos. Those other beings weren't the gods.
My understanding of the "idealist" position is that each person can have their own conception of the best blessed life possible, and that is *their* "god." That, to me, is part of the significance of those singular "god"'s in Menoikeus. That kind of "god" is deathless because you can't kill an idea. It goes on, being reconceived again and again
That's where my head is at currently on this topic.