Firstly, the short version that is in most bibles was taken from a much longer version. You might want to look at the longer version first.
Next, I can’t even imagine how many ways the story has been interpreted over the centuries. A transition myth would just be one more added story.
The story I always liked was the psychological yarn. Man losing self-awareness. Put into the garden and told not to eat of the fruit of the tree of the knowledge of good and evil. (This is what the Buddha taught. There are also teachings mimicking this throughout Christian literature. ‘Judge not lest you be judged.’) The knowledge of gook and evil, calling this bad and that good, is dualistic thinking. It is also the cause of most ignorance in the world. Nothing judges like religion. Right/wrong, Good /Evil Heaven/Hell God/ Satan. By eating the fruit of the knowledge of Good and Evil, man condemned himself to black and white thinking, to ignorance.
There are thousands of interpretations, adding one more to the pile really isn’t going to matter much…
It’s been done.