IMO, if it is an issue, it is only an issue to humans. The bible tells us that the demons do not question God's sovereignty, as illustrated by the dialog between Jesus and a few demons he encountered (Mat 8:29, James 2:19). If demons recognize that Jesus is God's son and that he is to torment them at some point, then who is God proving the issue of Universal sovereignty to? The angels who did NOT rebel against him? No, they are privy to the same if not more knowledge as the demons. The only ones left are humans! And we all know that the bible says that we need God because we can't figure things out on our own (Jer 10:23), so only people who don't believe the bible (according to the bible) are the only ones who do not recognize God's sovereignty! So why is he trying to prove his sovereignty to them? Not to mention that he makes those who acknowledge His sovereignty suffer right along with those who don't, which proves nothing! Makes no sense to me!
I'll illustrate it this way; Your neighbor is your best friend (Jehovah), and has a pair of trained attack dogs (Satan, demons) that he doesn't want anymore. He tells everyone that the dogs will attack at will until he gives the command not to. If anyone else happens to give the right command, they may or may not listen. He lets these dogs run loose in the neighborhood knowing that all of his friends, including you, must come and go on a daily basis. If the dogs are nearby, this will be extremely difficult! If not, you might make it for the day. All of the people in His household (Jesus, angels) are protected from these attacks by various means, and all know the precise commands and tones of voice to use to control the dogs. To beat it all, you have seen these dogs viciously attack your other friends relentlessly until they were begging for your best friend to command them to stop, but all he does is try to coach the person to defend themselves amidst all the noise and stress and pain, saying, "I'm proving a point". Years go by and the dog attacks continue, some even turning out fatal for the victim, all the while your Best friend watches every attack and does nothing. Then a point in time comes when He bans the dogs from coming onto His property (Satan banished to earth) by building a fence around his property and leaving the neighbors to fend for themselves, leaving only a written copy of how to try to resist the dogs (bible). At some point he says he will call off the dogs and send them to the pound to be put to death once and for all so everyone can live in peace.
What point does this prove?