It's generally not a good idea to defoliate autos, but many times it becomes a necessity. This appears to be the case with your ladies. They are lovely bushes but that means lot of shade and restricted airflow. I almost always have to defoliate as I use HPS lighting and heavy LST. This causes a beautiful dense canopy but it needs to be trimmed back often. My last 3x3 grow netted me 5 large freezer bags of defoliated leaves.
It's not always a good idea to defoliate but in your case you should to it carefully to expose more bud sites to more light. But unfortunately it is too late for that idea to still be good as you are in flowering since 2 weeks so the plant have her final shape and won't produce more leaves. You can pluck a leaf or 2 or you can knit your leaves together ( it's almost require to be done daily )
Definitely need to defoliate them. I am nearing the wnd of my first auto grow and I didnt do a lot of training and defoliation because you always hear they dont like it. About half way through I had to start pulling a lot of leaves and it didnt hurt them at all. My crop would have been improved a lot with earlier defoliation and more training.