The angel in Gen 3 as a flaming sword - and mankind that want to gain access - all of descendants of Adam until the flood - are potential violators without that angel.
But in Gen 2 - Adam is only there with animals and his wife and there are no "humans" that are "not supposed to eat of the tree of life" according to Genesis 2 - which is probably why none of your quotes above mention genesis 2..
Context is everything.
Context is everything. There were many holy Watcher angels in Eden, and they are there, still, except for the ones that did not get chained in Sheol below, at the time of the Flood of Noah, andthere were the created evil angels there, called "satans", created specifically to try, test, and tempt holy watcher angels and the Adam creation.
And the purpose for Paradise is still there, waiting for the manifestation of the "adopted sons of God" -as all creation does wait.
And God's plan did not change, he only is keeping Paradise for the regenerated sons of God to take their places there, and reign, with the Firstborn, the Kinsman/Redeemer, Christ come in flesh, who is to be called "The God of the whole earth", when He rules from Mount Eden above and Mount Zion below.
There were the seed of the human beings to come, already written in the Boook of Life, in Adam's loins.
Billions and billions and billions and billions...of human beings were going to come forth as " holy sons of God" from the loins of the firstborn Adam, the head of our race, before Adam died; nd all the seed died in his loins as holy seed for coming forth in their season to "build" the City of God" up, as the temple not made with hands for the Glory to indwell, and to "Plant the heavens thereby", as Scriptures teach.
So Adam was set to keep/guard/watch over Paradise, for the plan of God to come to fruit in its season.
Adam did not keep/watch/guard Paradise after all, but he became defiled in his flesh body and dead in his Adam spirit and unclean in his person/soul.
So now, Adam is divorced [we are all Adam], and the driving out of our firstborn father was the great divorce from the presence of the Glory and the fellowship with Him, "face to face", which Adam did have and all the seed would have, if there had been no death of spirit and divorce from Eden's Holy Mount.
Now the Cherubim guard the gate with flaming swords turning every which way.
Why do you claim the swords are cherubim, themselves?
Cherubim have four faces; the Adam face, Cherub face [which is the OX/Bull], lion face, eagle face; with hoofs like calvs, hands like Adam, and wings.
Swords do not have faces, nor feet, nor hands, nor wings, norfeet.
Why are the Cherubim guarding the Gate? -to keep out the Adam creation lest they enter and eat the fruit of the Tree of Life and live forever in the undying worm state, for after eating the fruit, the body will not corrupt, and to live in the state of incorruption but being defiled and uncleanforever is fir only for the last death, and rejects will be then cast into the Lake of Fire as never dying 'metamorphosing to the image of the glory of the sons of God of the human being kind], worms.
So they do a good job of preserving our inheritance for us, which we get in the New Man name of the Firstborn Son of God of the human being kind, who is our Kinsman/Redeemer, and who is YHWH come in flesh of second creation, with a New Man name, which name is "Israel".
So, if we were able to eat the fruit of the tree of Life in our defiled state, we are then only fit to be cast aways in the second death.
But, Jesus came and covered Adam's transgression, so that none in Adam will haveto live forever in the first death, nor suffer the second death, except those who willfully choose to reject the Light that lights every man that comes into the world.
Because the resurrection body will have Adam's transgression covered, by the once for all Atonement, those who are raised in the second resurrection have only the Lake of Fire to be their doom, forever and forever.
That is why that body is called a "never dying worm".
But we who are born again in Spirit are adopted sons, and like pupa's in the chrysalis, are hid in Christ, the Living Spirit, in God.
That, BTW, is represented by the Ark of Atonement in heaven's Holy of Holies in heaven's created temple -but that's another story.
such an one 
