First thanks for the reply, second, Romans 8:20 "For the creature was made subject to vanity, not willingly, but by reason of him who hath subjected the same in hope,". that's the key to choice, and free will.
Another thoughtful reply, but let's take a look at the NASB "the creation was subjected to futility, not willingly, but because of Him who subjected it, in hope" (Romans 8:20).
101G, you highlighted "was made subject to vanity". That does not indicate by the choice of the creation nor of the creation's free will; on the other hand, in fact, the verse specifically indicates that the creation "was subjected to futility" "because of Him who subjected it".
In Romans 8:20, it states "not willingly" while at the same time it does not state "willingly", so willpower is not indicated as a cause for the effect of "vanity"/"futility".
If you try to apply "not willingly" specifically to the creature (and I am not saying that is valid), then that vanity, that futility, mentioned by the Apostle Paul needs to view back at "When the woman saw that the tree was good for food, and that it was a delight to the eyes, and that the tree was desirable to make [one] wise, she took from its fruit and ate; and she gave also to her husband with her, and he ate" (Gensesis 3:6).
We find actions indicated in Genesis 3:6, not choice, not free will, but action.
Genesis 3:22 "And the LORD God said, Behold, the man is become as one of us, to know good and evil: and now, lest he put forth his hand, and take also of the tree of life, and eat, and live for ever:"
that's a choice of free will.
Item 2.3. in the original post addresses Genesis 3:22. Here's an incomplete summary, Adam would have had to know TO CHOOSE between good and evil prior to eating from the tree of the knowledge of good and evil; in other words, Adam did not know the difference between good and evil until AFTER Adam ate of the tree (Genesis 3:22).
that's a choice of free will. as with this, Genesis 1:26 "And God said, Let us make man in our image, after our likeness: and let them have dominion over the fish of the sea, and over the fowl of the air, and over the cattle, and over all the earth, and over every creeping thing that creepeth upon the earth."
dominion is to act, and this was given unto them by God himself. thay had the right to act either good or bad. that's free will.
PICJAG.
Item 2.1. in the original post addresses Genesis 1:26. Here's an incomplete summary, God will not use willpower in order to perform evil against God's self (Psalm 5:4, Psalm 92:15, Deuteronomy 32:4); therefore, it follows that Man could not use free will in order to perform evil against God.
You wrote "dominion is to act". This is the point. Action is described. When you wrote "thay had the right to act either good or bad. that's free will", then you are conveying that they KNEW good and evil before they ate of the tree of the KNOWLEDGE of good and evil, yet that is not the case because the Word of God said "Behold, the man has become like one of Us, knowing good and evil" (Genesis 3:22) indicating a transition point for man from (A) not knowing good and evil BEFORE eating of the tree - transitioning to - (B) knowing good and evil AFTER eating of the tree; therefore, free will is not indicated, and this concurs with the Apostle Paul's writing in Romans 8:20.