There seems to be two distinct ways of looking at the purpose of the Cross.
On one side there is the idea that Christ’s work was to repair what Adam had done and restore mankind to the state man had in the Garden of Eden.
The other side holds the idea that Christ’s work was to bring about a new Creation.
Mankind is not restored to a previous state. The fellowship that Adam had with God was destroyed by sin, but the fellowship man has through Christ is a different and more intimate than known prior to the Fall.
When Christ died and His substitutionary sacrifice accepted by God for the sin of the world (all mankind) no one was "restored" to a "state like Adam" or a "new state in Christ."
Only when God places an individual into Christ is the person "reconciled" to God.
Thus God is "reconciling" the world, one sinner at a time, to Him.
What is different between the two states?
When Adam sinned, that sin was counted against Adam.
When a new creation in Christ does something that would count as a sin for the lost, it is not counted as sin against the individual who is within the propitiatory shelter of Christ.
The main problem answering this is that we do not know Adam status before the fall, as I suspect that he was much grander and glorious then any of us once saved!
Exactly!
We are in a work in progress to be completed in the next world.
Adam caused the ruin of the universe so people have to be moved to the New Jerusalem, or Heaven.