Satan was the only angel God questioned over even being at the meeting. Satan was and still is the Accuser of the brethren. Of all people on earth God could brag on His friend Job, doubtless knowing Satan was there on that account, and not as claimed just roaming earth. No other topic was brought up from Satan. Satan came there knowing exactly what Job was about, was able to discuss him with God. That's a perfect picture of a modern prosecuting attorney having already made available facts of a case to a defense attorney, before taking the case to court. It's like a lawman is permitted to let a suspect talk without counsel, allowing him to say incriminating words, which allows probable cause to search a vehicle for evidence of a confessed crime. There was nothing wrong with the lawman bringing up a conversation matter that he knows might cause the suspect to tip his hand. So what was at all wrong for God to bring up Job? God can't lie or sin.
Since Satan was defeated in the case of Underworld v. Job. Might that have been God's plan, while remaining Righteous, letting Satan hang himself? In the end God was also Just concerning losses not by His hand.
Since we are now speculating some, I'll think God already knew Satan wanted to get to Job because of that hedge of protection, but couldn't, so came there with accusations against God and Job. When someone is falsely accused in a court, it's proper to prove a false accusation is wrong, though the accused is unwise to try being his own defense attorney. God could just make it go away, but chose to prove his approval of Job. He didn't raise a finger against Job, but let the hedge down, allowing Satan to touch Job, there being no general covenant giving a moral right, even for God, to give the one man divine protection.
Satan said in verse 5: Job 2:5-6 (KJV)
5 But put forth thine hand now, and touch his bone and his flesh, and he will curse thee to thy face.
God said instead:
6 And the LORD said unto Satan, Behold, he is in thine hand; but save his life.
Where does it say Job's original children died and "went on to be with God"? What covenant promise made that possible? Perhaps they went to Paradise to await Jesus' preaching the gospel, not having a clue what was happening or to happen. There's also the death of practically all of Job's servants who were not likely among the drinking and eating folks.
As for God managing accusations from Satan His way, you would have to include true accusations in the process of managing that. I have no doubt Satan is still accusing Christians who have hidden sin, and seeks to destroy the upright. It isn't that when those accusations come is when God learns about issues. He already knows. But when the Devil learns it, one's life could get rough while that gets sorted out, instead of confessing to God and repenting, choosing His hand of grace. That brings up quite a list of topics to discuss!
I agree with what you wrote that I didn't challenge.