I think what you may be missing about our queries is related to firsthand Koi Husbandry knowledge and skill. While I do appreciate the great difference between RWG's approach as opposed to ADI's, neither has demonstrated hands on knowledge of successful Koi husbandry. There is a different level of knowledge that does have its rightful place in the discussion.
For example, while I do find the information presented by Mr. Russell about water quality, filtration, bioloading, etc... to be perfectly fine (especially the conservative fishweight/bioload calculations), I could have googled all of it and made an accurate and persuasive presentation on water management in a matter of hours or at most days, without having ever owned a living fish (not even a guppie) in my entire life. I'm not implying that is true of Mr. Russell, just putting things into perspective.
Excellence in Koi Husbandry is something we all strive for, because we find them beautiful and challenging. No experienced ponder who loves his fish will put them in a "compromised" environment. Newbies come here and to other forums often looking for answers about why their beloved pets are sick and dying, and all too often the answer is the same. Cuts, bruises, abrasions, broken fins, bacterial infections, parasites, neurotoxins, etc... all because they wanted rocks.
No doubt RWG will successfully market a great many "bipartisan" ponds over the next few years. As their popularity grows, so will the number of posts we see from newbies looking for help. It has happened before and it will happen again. RWG's idea is no different than what a great many DIY'ers have done already, and we've already seen what happens.
I truly don't see the need for the "Hybrid" niche market pond. A good salesman who knows his stuff can take a new customer by the hand and show them a beautiful rock garden full of plants and an equally beautifully constructed Koi pond full of living art... explain the difference and the reasons why. Only a poor salesman needs an unhealthy compromise to make the sale.