I know it would have been much more of a pain to manage, but now you are seeing where the advantage would have been with smaller holes in the screen. I like 2" holes in my SCROG so that I can better manage the vertical height because with the larger holes you have no choice but to let them go vertical sooner and the stretchy ones tend to get away from you a bit. I will try to run a closely managed 2" screen on my next run so that I can strictly maintain a 16" light distance above the canopy.
This looks great however and that screen will help keep everything managed fairly well, but I intend to take your copper frame idea to another level. It will be a super pain not just to build, but to manage there in late veg and stretch... probably requiring 2 hours a day tucking and routing... but it will be worth all the trouble in the end, allowing me to keep things in the sweet spot of my COB lights.