In the comments section of the Sinners or children of God?, Judah and Turgonian have been very helpful to advance some of the thinking.
The discussion has evolved into a question of why children of God need to continue to confess their sins. The answer, in short, is sanctification.
I have found a very helpful resource, a short chapter (8) of the book “God forgives sinners”, by WE Best, that takes a fairly comprehensive look at the same question.
It can be found here:
CONFESSION INCLUDED IN RESTORATIVE FORGIVENESS