that's a matter of opinion. i think it is better to have the added air flow you get up through the screen.
I agree, air flow throughout the screen is key but that defoliation all occurs at screen level, there shouldn't be anything below the screen except the medium and the pot. Chopping off potential bud instead of bringing it up to the canopy is a double negative IMO. I bring all that up and turn it into weight w/o ever adding the pruning stress to my plants. I pull 4-7 ounces per plant (5.5 avg), 4 plants per light, under 400's. If that's wrong, I don't think I wanna be right,lol
The tutorials I posted have been around the net for a good 8 yrs now, literally thousands of folks have benefited from them. the best part about them though is the chatter we get between growers. I'll be the first to admit I don't know everything and chewing the fat is how super techniques are developed so yea,...I'm in, link me to that scroggers thread please