This is a very important question that deserves an urgent answer and this reminds of the story of a Man in the holy book "Lazarus and the wealthy man"

And yes if the souls that are no more are giving a chance to come back, I believe they will live better, I believe the will do better but that they have no chance at all to be better however, we do

Yes, we that are alive have all the chances to be better and live right, each day we wake up is a chance to be better so we had better use it wisely

Nobody knows when we will be out of chances