It probably is where individual thinking comes in, the question is probably a little too specific, I am sure that there can't be a dramatic difference either way round. At the most the alternate hand would only be inactive for a few minutes.
I might try out the alternations though and see how they go. The only thing I think which may be problematic is the constant change breaking the 'concentration' of the other hand thus taking longer to get it to grips with the section...I don't know.
Dr. Chang is more into the physiological mechanics of playing. Sir Bernhard provides the best learning methods based on psychology. One knowledgeable in both fields, plus the finer aspects of music and piano, should be able to answer any piano question. But LOL, we are not that person.
I wish I learned this in high school, and applied it in college. But then I wouldn't be studying music right now.
Just a theory, but maybe the 7x rule is there so that you can retain a little, and forget a little. That way, you have a stronger memory when you rememorize it the next day. But if that is the case, then memorizing an entire section in a day is out of the question, but at the end a week or month practice it is perfectly memorized, even performable.
In this case, you might not be able to learn on demand i.e. finish a section in time for the weekly lesson. But suppose you really drilled in your HS and not limit yourself with 7X20, cramming everything on lesson day or the night before, would it work out? Or would you forget so much the next day, that it was useless?
Better try it for yourself. Even before I learned about these methods, (that is, by my intuition) I used HS + segmental practice and repeated phrases 8 times in practice sessions of 30 minutes. When I found out about 7x20, I was convinced that I was on the right track.
But you can completely disregard what I said! Despite what I learned, am still a slow learner compared to my classmates.

I have no "intuitive methods" to go back to, since my own method (8x30) is the unusual one. I tried, but ramping up HT like what they normally do is something I can't do.