MacMilllan didn't utilize anything, it was pure luck, ball took an edge and went for a boundary, it was not intentional shot that you could say he utilized the field.
When fine leg was brought up in the circle, commentator said, is it a good thing in this situation? Because with tailenders, fours usually go through fine leg or third man, yes they were penalized and were forced to bring one player inside but I'd say it was amateurish decision from Pakistan's side that they brought fine leg inside the circle.