Just commenting from my point of view on the discussion arising from this post of yours, with a reiteration of something I said earlier.
Adam is important to redemptive history because he trangressed a command of God. But he is important on a greater scale because he was given a command by God, in a way that no other human before had.
Our models need to encompass what the Garden was intended to achieve for and through the human race created in his image, as well as what happened when Adam failed.
Adam was called from that race (whatever we conceive about their intellectual, moral or spiritual capacities) in order to be the forerunner in a new phase of creation involving covenant intimacy with God and, it would seem, an “absurdly” elevated role over God’s whole creation, including the angelic order. That role does not constitute “the image”, though it does embody what the image entailed, just as Abraham’s individual role was as forerunner of redeemed mankind.
The image was the basis and form of mankind’s creation, so could not be lost without mankind ceasing to be human. In any case, the calling of God is irrevocable - and that is also so for the positive role Adam was intended for in the Garden. That’s why it’s important not only that it is Adam’s descendants who are redeemed in order to be glorified with Christ, but that Christ himself should be of Adam’s line.
In the old theology of atonement (a strand neglected but still valid) Christ defeated Satan’s plan to dethrone Adam by achieving, as the son of Adam, what Adam failed to achieve. God’s choice of both humanity generally, and Adam particularly, was thus vindicated through the salvation of Adam’s line.
Since Satan no longer had a hold on the race through the accusation of sin, he can be justly punished, and mankind can be justly glorified. So God is indeed to be praised for redemption and remedying Adam’s sin, but even more for achieving the purpose he initiated before there was sin.
That’s why it’s worse to be “infra-Adamic” than “pre-Adamic”, but better to be a redeemed sinner than a pre-Adamite: Eden was a positive watershed (ultimately) more than a negative one.