God will patiently explain the truth of whatever it was that His children were ignorant of, and that will take care of the problem.

Tom, how does your answer harmonize with the following insights:

TDG 48
Transformation of heart means an entire change of the entire man. "Except a man be born again, he cannot see the kingdom of God," Christ declared (John 3:3). This change of heart is unseen; for it is an inward work, and yet, it is seen, because it works outward from within. {TDG 48.3}

“The characters formed in this life will determine the future destiny. When Christ shall come, He will not change the character of any individual.” (4T 429)

The character has to do with the trend in one's life. It involves the feelings and thoughts and actions. These will continue as they were when a person died.

A person may have been doing things wrong which he wasn't aware of. These could have led on earth to defects of character with which the person was unaware. God will patiently explain these things.

Tom, it would be nice if you could post some quotes that say Jesus will "patiently explain" to us our unknown defective traits of character, and what Jesus will do with them afterwards.

There's no need for quotes. It's self evident. When many get to heaven, God will explain to them about concubines and polygamy. God will explain about the Sabbath to many.

Here are "proof-texts" for those who need them:

"Some among the redeemed will have laid hold of Christ in the last hours of life, and in heaven instruction will be given to those who, when they died, did not understand perfectly the plan of salvation. Christ will lead the redeemed ones beside the river of life, and will open to them that which while on this earth they could not understand." Undated manuscript 150. {1SM 262.2}

"Christ will lead the redeemed ones beside the river of life, and will open to them that which while on this earth they could not understand. {FLB 14.6}
In the light that shines from the throne, mysteries will disappear, and the soul will be filled with astonishment at the simplicity of the things that were never before comprehended." {FLB 14.7}

Nice quotes!

Nice quotes, indeed, but they fail to prove that we are saved in our sins, that Jesus will change our defecitve traits of character when He returns.

No one I know of is trying to say we are saved in our sins, MM. If that is your conclusion, than I can understand a bit better why for so many years we have been on this merry-go-round with you.