Even to ancient Epicureans their gods were material beings, not some kind of symbols. On top of that, Epicurean gods are completely removed from human existence. Their existence couldn't be more alien to us even if we tried. Treating them as symbols of human potential excellence is like taking someone whose only language is English and asking them to translate from Chinese.
In that moment where we start talking about something that is outside of our sphere of influence, it becomes symbolic. I agree that they are very alien because they master those both points of life being limited and of emotional imperfection, due to living in an area of cosmos where they enjoy perfect settings. This is what makes them godly. My personal aim is to live the happy life as proximate as possible under the perishable conditions of my existence.
The prolepsis of the Gods and ultimate excellence are as much wrong assumptions as ultimate power is. They are based on wishful thinking, nothing more. You're trying to fight fire with fire here.
I agree that thinking from the traditional framework of a deity as being over- or all-powerful and being obsessed with humans, this is substituted by Epicureans by not only the idea of imperishable and blessed Gods who live a seclusive life but also "Nature".
Additional to us living within the framework of "Nature", the correct prolepsis of the Gods is uploaded where others hold their beliefs. Personally, I like the idea of uploading a corrected version that amplifies the fullness of pleasure and of divinity being not harmful and being distant, thus ruling out any kind of supernatural instance that could worry us. I know we could do theoretically without, but people will trade one imaginary divine force for another, so rather create a placeholder, even as non-believer.
Imperishable and blessed beings are as much human superstitions as any other ultimately powerful friends used as pillars for religions. Again, it looks like you're trying to fight fire with fire. You're just switching one type of imaginary friends to another.
Isn't Epicurus saying himself: “But I summon you to continuous pleasures and not to vain and empty virtues which have but disturbing hopes of results.”?