There's an interesting paper "The Polytheism of the Epicureans" by Paul Terrence Matthias Jackson which may also be relevant here.
My guess is that Epicurus' take on the gods wasn't primarily negative, but equally positive in his redirected way of thinking about them. But we've moved so far from the Greek ideas of the gods that his ideas on the subject may seem irrelevant to us. So a further question is whether it makes sense for us to attempt to apply the Epicurean ideas of the gods to our modern lives, or is doing so a form of historical reenactment?