Depends. If you are having humidity/airflow issues or light is being blocked from reaching lower flowering sites, then yes defol a little more. If not then just leave it be. Based on your photos I believe you are fine where you are. In flowering, you don't want to defol a lot because it can stress the plant. I usually will defol a fair bit during the stretch that happens the first few weeks of flower and then just maintenance defol of 5 leaves or so a day each plant as needed to keep light penetrating deep into the plant.