Eze 36:26 "Moreover, I will give you a new heart and put a new spirit within you; and I will remove the heart of stone from your flesh and give you a heart of flesh. (God's sovereignty)
To complete Augustine's logic you have to conclude that when God states that He will give us a new heart and spirit and cause us to walk in His statues, He means just that. Since God is perfect, His "new heart and new spirit" gift to us will also be perfect.
You can post all sorts of "free will" verses just as I can post all sorts of "God's sovereignty" verses. However, you will never get past the Augustinian logic above. You will never be able to satisfactorily explain Ezekiel 36. All I'll ever here is "yeah but this verse over here says...".
OTOH, for Ezekiel 18 I would simply answer as Augustine would answer, that God commands what He wills and gives what He commands. He gives us a new heart and spirit as He states in Ezekiel 36 and then He commands us to use it as in Ezekiel 18. God promises that this new heart and spirit will allow us to walk in His statues man. It's all because of God's working. If God so empowers us, it will happen.
This is exactly the way He works with all your verses.
He was handed over for our offenses, and he rose again for our justification. What does this mean, for our justification? So that He might justify us; so that he might make us just. You will be a work of God, not only because you are a man, but also because you are just. For it is better that you be just than that you be a man. If God made you a man, and you made yourself just, something you were doing would be better than what God did. But God made you without any cooperation on your part. For you did not lend your consent so that God could make you. How could you have consented when you did not exist? But He who made you without your consent does not justify you without your consent. He made you without your knowledge but He does not justify you without your willing it.
*Augustine was a Christian Catholic.
Get your own saints and leave ours alone. Stop trying to expropriate our Saints. It ain't working