Here the prayer is so horrifyingly concrete whereas our old Adam prefers abstraction. When we pray this Fifth Petition we should not be thinking primarily about forgiving every bloke in the world who might possibly do us wrong. Then there are our children, other family members, and of course the other Christians in a particular congregation where God has called me in particular to hear the Gospel and receive the Bread of life. Nonetheless, Jesus has been given for each one of us in particular and He meets us corporeally at the communion rail and forgives us vast amounts of sin every day in our baptism. We have glimpsed a facet or two of this many splendored diamond.
Petitions remain untouched, along with the Doxology and the great Amen.
But there will be time for them later, in other opportunities to learn the prayer that Jesus gave.