I'll seek to answer each point one by one.
The implication of my argument is that God was irresponsible in with his original creation, and people have suffered as a result.
And we do recognize the implication. However, God did no wrong. He told us what not to do, and we disobeyed him. I fail to see God's irresponsibility in this, when in fact the real irresponsibility lies with humans, his rebellious creation. As it is said in James 1:13-14: "For God cannot be tempted by evil, nor does he tempt anyone; but each one is tempted when, by his own evil desire, he is dragged away and enticed."
Him coming down in the future does not atone for past errors, he is still responsible for those who he let die. He shows repentance, yes, but does not end the problems to start with.
Whoa, whoa, whoa. This is presupposing way too much here. God does not show repentance because if he is the perfect good, he has nothing to repent. God created life. He could have chosen not to create life, but he did create life, and he made it free. God as the creator of life has the right to take it away; if you don't own life, you have no right to take it away. Furthermore, Jesus' death is ignored, which forgave the sins of mankind. God is just for death at the moment, because "the wages of sin is death" (Romans 6:23), but he has been merciful: he sent his son to forgive us of our sin to give us everlasting life in him.
Besides, reparations could be perceived as not creating the necessary retribution for misdeeds, especially when God does not suffer from it. For example, if I injured a person, they could sue me, and I would pay up. In this exchange I lose something when held accountable; whereas God being all powerful, can never lose anything and thus it is impossible to enact any sense of metaphysical justice on him. Thus, the moment God infringes upon the moral code, he is held infinitely responsible because he can never make true amends.
Remember that the world, our basic ethics, and our lives are his creation; he has the right to change it with his will. He is the supreme good. But also, death is not the end. There is the final judgment, where some will be rewarded, and some will be punished, because he is good and just. To believe that because he is good, he won't do any punishment whatsoever is a contradiction; precisely because he is good and because he is just, he gives punishment.
Especially consider that God prefers retribution for punishments demonstrated by his destruction of cities and such, Psalms 94:1 Lord, the God of vengeance,
O God of vengeance, let your glorious justice shine forth!
Now look at the entire context of the psalm. Here are a few snippets from the psalm as well:
"He will repay them for their sins
and destroy them for their wickedness;
the LORD our God will destroy them."
"Does he who disciplines nations not punish?
Does he who teaches man lack knowledge?
The LORD knows the thoughts of man;
he knows that they are futile.
Blessed is the man you discipline, O LORD,
the man you teach from your law."
The Psalm speaks about God's "vengeance": how he will punish those who are evil, and save those who are good. I see nothing but an affirmation of his goodness once the whole context is taken into account.
I've also heard the objections over the God of the Old Testament many times, and my conclusion is that you have to understand the culture. These people that the Israelites conquered were evil and corrupt. They did abominable acts that disgusted the Lord, and he had to punish the guilty. Furthermore, Israelites always offered an envoy of peace before going into an enemy city. If they declined, punishment would fall on their heads. If they declined, often times they would send the innocent from the city to flee: women and children, leaving the most hardened individuals. So my reply is that they had it coming. It seems cruel, but it is not; it is discipline.
