John Mann would it have been impossible for God to create a world with free will, but without suffering? If you say that would be impossible it does seem to set a limit on God.
God doesn't like paradoxes.
Our rational soul is an image of God's attributes. Some attributes we reflect in fullness like liberty. We perceived liberty in its infinity form.
So we can approach the problem of limiting liberty.
If God had limited our freedom just to one thing someone could object the possibility of God had limited something more. And that's would be a valid question ( related to our sense of justice).
We know we have infinite freedom inside our minds. Our souls are total free to think anything and make judgements based on these free flights.
What would be if you reached a wall in your free will?
Automatically your sense of justice would protest about it and in a valid way.
Suffering is a consequence of choice of evil. If the majority of humanity chose not to do evil I think we would be able to solve almost every physical problem. Imagine using all the military research in science to cure diseases... I think (even in our fallen condition) we could cure any disease and prevent any accident.