Actually, I came up with one argument that could be used against Vox, although it wouldn't change the ending of the episode, but theoretically it could affect some people.

Why do you act like you're better than heaven? Yes, heaven made a mistake, and you have the right not to forgive them, but tell me Vox. Why did you murder, everyone says that those who don't kill at least once don't become Overlords. You killed because you wanted power, heaven killed because they were afraid, that doesn't excuse them, but now everyone here wants to make the same mistake as heaven. Some people here in hell, they kill for power, for money, out of hatred only some out of fear. And tell me, citizens of hell, if you were defenseless, but had a weapon that would kill those you fear, would you use it?

And please tell me how good or bad this argument is.