Always love it when "rules" are broken and positive results are achieved. I love to play with my plants to push the limits. I'm sure that you have, but have you done a comparison with leaving more leaves on vs the more extreme shearing?
Sometimes when I defoliate, I wonder if the plants are just going to push more energy into trying to regenerate those leaves. Or...the opposite of what I'm aiming for. If that makes any sense. I'm usually happy with my plants and yields, and still improving on my methods. So I don't have the balls to stray too much from what I do now yet. Then again, I have grown autos out and left them untouched and know how that ends up.