I continue to have suspicions about the "Idealist" interpretation:
What good is a god that is just a dream?
This says to me that Twentier has the same observation I do - that when people say "the idealist interpretation" they mean flatly "Epicurean gods do not have a physical reality."
And I don't think the "idealist" interpretation as we are defining it here is persuasive for that reason.
It would be easier to talk about the "Voula Tsouna interpretation" or the "David Sedley Interpretation" and then define what that is, because at least then you could quantify exactly what that means if you tried hard enough. For all I know (and I gather that they do) David Sedley or others have some version of a compatibilist view where gods of a type are both real and serve as important idealist models which are worth talking about because they are models.