Despite your rudeness, I did not go home LOL
Though you can get more flies with honey
I will say that I agree with you about all the shelves and when we re-do the pond I will remove most of them. I will leave a small area of 2' deep shelves for my lilies and that is it. The rest I will dig down to 6' with vertical walls.
The guy I get my Koi from has 50,000 gallons of water in his yard easily. He has several koi ponds and his selling tanks with the koi seperated into size and quailty. None of his ponds have rocks. His ponds are all at least 5' deep. I like the look. Because of how deep it is the algea doesn't grow on the bottom since it does not get sun light so they just look like crystal clear very deep ponds.