I'm hoping you will answer the questions above. To answer your question, I believe he would have been relieved to discover Jesus imputed the repentance he would have experienced had he not died first.

Tom, do you think since Moses knew he was guilty of a grievous, character impacting sin that if he had died before repenting of it that God would simply ignore it in judgment, treat it as if it never happened or as if it had been repented of? Does it matter if such people commit such sins under such circumstances that they didn't repent of it before they died?

MM, what do you think Moses' first thoughts would have been upon being resurrected? (in the scenario that he died while sinning, before he could repent)

God does not force the will or judgment of any. He takes no pleasure in a slavish obedience. He desires that the creatures of His hands shall love Him because He is worthy of love. He would have them obey Him because they have an intelligent appreciation of His wisdom, justice, and benevolence. And all who have a just conception of these qualities will love Him because they are drawn toward Him in admiration of His attributes...

He (God) would make them happy if He could do so in accordance with the laws of His government and the justice of His character. He surrounds them with the tokens of His love, He grants them a knowledge of His law, and follows them with the offers of His mercy; but they despise His love, make void His law, and reject His mercy....

Those who have chosen Satan as their leader and have been controlled by his power are not prepared to enter the presence of God. Pride, deception, licentiousness, cruelty, have become fixed in their characters. Can they enter heaven to dwell forever with those whom they despised and hated on earth? Truth will never be agreeable to a liar; meekness will not satisfy self-esteem and pride; purity is not acceptable to the corrupt; disinterested love does not appear attractive to the selfish. What source of enjoyment could heaven offer to those who are wholly absorbed in earthly and selfish interests?

Could those whose lives have been spent in rebellion against God be suddenly transported to heaven and witness the high, the holy state of perfection that ever exists there,-- every soul filled with love, every countenance beaming with joy, enrapturing music in melodious strains rising in honor of God and the Lamb, and ceaseless streams of light flowing upon the redeemed from the face of Him who sitteth upon the throne,--could those whose hearts are filled with hatred of God, of truth and holiness, mingle with the heavenly throng and join their songs of praise? Could they endure the glory of God and the Lamb? No, no; years of probation were granted them, that they might form characters for heaven; but they have never trained the mind to love purity; they have never learned the language of heaven, and now it is too late. A life of rebellion against God has unfitted them for heaven. Its purity, holiness, and peace would be torture to them; the glory of God would be a consuming fire. They would long to flee from that holy place. They would welcome destruction, that they might be hidden from the face of Him who died to redeem them. The destiny of the wicked is fixed by their own choice. Their exclusion from heaven is voluntary with themselves, and just and merciful on the part of God. (GC 541-543)

As the books of record are opened in the judgment, the lives of all who have believed on Jesus come in review before God. Beginning with those who first lived upon the earth, our Advocate presents the cases of each successive generation, and closes with the living. Every name is mentioned, every case closely investigated. Names are accepted, names rejected. When any have sins remaining upon the books of record, unrepented of and unforgiven, their names will be blotted out of the book of life, and the record of their good deeds will be erased from the book of God's remembrance. The Lord declared to Moses: "Whosoever hath sinned against Me, him will I blot out of My book." Exodus 32:33. And says the prophet Ezekiel: "When the righteous turneth away from his righteousness, and committeth iniquity, . . . all his righteousness that he hath done shall not be mentioned." Ezekiel 18:24. {GC 483.1}

Though all the record of all our sin, even though written with the finger of God, were erased, the sin would remain, because the sin is in us. Though the record of our sin were graven in the rock, and the rock should be ground to powder—even this would not blot out our sin.

The blotting out of sin is the erasing of it from nature, the being of man.

The erasing of sin is the blotting of it from our natures, so that we shall know it no more. "The worshippers once purged"[Hebrews 10:2, 3]—actually purged by the blood of Christ—have "no more conscience of sins," because the way of sin is gone from them. Their iniquity may be sought for, but it will not be found. It is forever gone from them—it is foreign to their new natures, and even though they may be able to recall the fact that they have committed certain sins, they have forgotten the sin itself—they do not think of doing it any more. This is the work of Christ in the true sanctuary (The Review and Herald, September 30, 1902).