I agree, I think.
I only don't if I don't fully understand what you are saying. Would you agree if I worded my view this way?
The first imputation---that of Adam---
is actual. It made the human creature a sinful being (one who does sin, and so is not, and cannot be, perfect in righteousness.
The second imputation---that of righteousness through Christ's person and work---
will be actual,
1) Imputation, by definition, is not "actual," it is
reckoned, accounted, ascribed
as though it were actual.
As in adoption does not make one an actual biological child, it makes one (legally) counted/reckoned/ascribed
as though a biological child.
Abraham was
imputed/reckoned/
accounted as righteous (
Ge 15:5,
Ro 4:1-5), he was not
actually righteous (sinless), he was still sinful with a fallen nature.
2) Adam's fallen (sinful) nature was actually
caused by his fall (disobedience) which we now inherit as his descendants, which fallen nature is incapable of perfect obedience, and which disobedience/sin is the cause of man's condemnation at the judgment.
In addition to being guilty of sin committed due to his fallen human nature, man is also guilty of Adam's sin
imputed to him (
Ro 5:14 17-19),
which is why all died between Adam and Moses ("sin was in the world") when there was no law to sin against and, therefore, they were
not guilty of any personal sin (
Ro 5:12-14) to cause their death.
They
were guilty of Adam's sin
imputed/reckoned/accounted to them (
Ro 5:17), which
imputation of Adam's sin to them is the
pattern of the imputation of Christ's righteousness (
Ro 5:14. 18-19).
3) Imputed righteousness does not make one
actually (by action) righteous,
one is only
reckoned/accounted/ascribed as righteous, and outcomes of both the actual and the imputed are the same--children of God.
Imputed sin of Adam does not make one
actually (by action) guilty of Adam's sin, only reckoned/accounted/ascribed as guilty, the outcomes of both the actual and the imputed being the same--eternal condemnation.
Condemning them before the holy God who created them. Legal code of law or not.)
Fallen nature and imputation of Adam's sin are two different things.
Fallen nature is
inherited, it is
actual, it is
not imputed (
accounted, reckoned).
The
guilt of Adam's sin is
imputed (accounted, reckoned), it is
not inherited, it is
not actual for man does not inherit the guilt of his father's sin.
All mankind is condemned by the sin of Adam imputed to them (
Ro 5:12-14) without ever committing an act of their own.
The second imputation---that of righteousness through Christ's person and work---will be actual,
Imputation, by definition, is not actual.
Righteousness can be imputed, righteousness can be actual, righteousness can be non-existent, etc.
There are two kinds of righteousness:
justification - sentence of acquittal,
declared "not guilty," sinless,
forensic righteousness (
imputed because one is now sinless)
sanctification -
actual righteousness of obedience in the Holy Spirit.
The "righteousness of Christ" imputed to us in justification refers to the
forensic righteousness imputed to us due to the death of the righteous Christ which removed our sin.
Our
actual righteousness is by sanctification through obedience in the Holy Spirit.
I suspect this is all as clear as mud.
but in this age we are still a sinful creature, but our sins cannot and will not be counted against us, because in Christ we are judged righteous. Sin has lost its power to condemn us because they have met God's justice against sin, on the cross. Jesus, who did do perfect righteousness, paid the debt and nailed our sins to the cross.