I won’t pretend to have the answer to the POE, but I would like to point out the fact that we must differentiate the POE from the POS (Suffering).
Suffering (war, hunger, other people’s evil) is not a moral burden on the sufferer. It does not substract from the potential for Salvation of the sufferer. Every person under any circumstances still has (should have, at least, if God is fair) the same ability to Save himself by bowing to God. Unborn babies, Mother Theresa and Hitler all face God in full understanding (i.e. with full understanding of God and Creation) and make a decision on whether or not bowing to God (i.e. repenting of all sin, if any) and opt for full Salvation or banish themselves to Damnation (a state of constant flight from “that from which you cannot flee”). Mom has a picture of you with your hand on the cookie jar and you can smile with your teeth full of chocolate chips and say “sorry” and get a hug or you can spend the rest of eternity saying you didn’t do something there is a picture of.
What they have suffered in the material life is no match for the reward in the afterlife. Any length of time is nothing compared to Life Eternal. Human suffering is inconsequential. An artifact of Creation.
What suffering they have caused, though, does make a difference in facing judgement (and that judgement decides what the afterlife will be) and that is why it makes sense to live the material life even if it is insignificant in contrast to life eternal. It is easier to say “mommy, I am sorry” for eating a cookie than for bludgeoning your baby brother to death with the cookie jar, after all. Even if you know that mom will forgive you no matter what.
The suffering you cause is insignificant to the victims of it but places a burden on you as you must ask embrace it at some point. Particularly if your bad deeds are done in knowledge of their evil or in defiance of God. If mom always bakes you cookies and you eat a cookie without knowing that this batch was for something else, it will be easier for you to face mom than if she told you not to eat them in the first place.
So suffering is inconsequential for its victims. No need to worry about the victims of injustice which you cannot help and no point in asking why you are suffering.
Causing (and of course, allowing) suffering, though, raises the effort you will have to make to embrace Salvation.
You must be Free to choose between embracing this Salvation or rejecting it. It is the one significant choice you will make in your Life. The choices you make in life and that lead to it will modify how you face the opportunity for Salvation but will not limit your choice.
Evil is then a personal issue. You bring Evil upon yourself but not upon others. This Evil is all your own making. God makes you free to choose it but doesn’t impose it on anyone and is not responsible for suffering.
The POE remains for an omnimax God, of course. Why would God make you Free if He knew you would choose Evil (i.e. not seek Salvation)?. Even if your evil is inconsequential to the rest of Creation, you still remain a blemish in what should be a “perfect” Creation. Are you really Free if God already knows what you will choose? Is God really omniscient if he doesn’t know what you will choose? Maybe that is just the boundary of God’s omniscience. Maybe God only knows all there is to be known and your choice is not to be known until you make it.