Hey - I may have lost the plot on what you are trying to achieve. The way you’ve explained the rock makes sense to me. As long as we’re having fun talking about your model, I think we’re good.
The other issue has more to do with framing techniques. I’ve built houses from foundation to roof… but that was a long time ago and I wasn’t the foreman. So, I don’t have all of the terminology at the ready. Let’s say your outside walls look like they are pocket beams to me and that doesn’t seem correct.
The two ‘styles’ that are more familiar to me look like this (ignore the red arrow… best example I could find in a pinch):

Here beams are connected with hangers (not what you are doing) and set on the wall (what you are doing). But you are enclosing the interior space with shorter boards. That’s why it sort of looks like a pocket beam to me. Not saying this is ‘wrong’. But it seems to me that would be open or there would be blocking.
What I mean about the corners is that the outside sheathing has no place to nail of the corner edge, so the sheathing is a ‘hanging corner’. I think that needs a ‘California corner’, …or something to nail to.
Interesting that you mention publishing in evolutionary biology. I have a psychology degree with a concentration in behavioral neuroscience and an ongoing, primary, interest in ethology. I use Tinbergen’s 4 Qs to frame questions about behavior and so have an interest in phylogeny, ontogeny, mechanism/causation and function. I’m also fairly familiar with applied behavior analysis (dog training!). I’m somewhat keeping an eye on ‘addictive technology’ as I believe we’re living through a time of dramatic cultural change driven, in part, by the introduction of the -nearly- ubiquitous internet. It’s my impression that people aren’t always ‘steering their own ships’ and unfortunately moods and behaviors reflect that. Or what I really mean is that I feel sorry for the kids!
Not sure what MRCA is but if I gather, you’re interested in cooperation. I’d probably be more in the Dawkins camp but I heard that E. O. Wilson has -somewhat recently- become more open to group selection (not sure to how many species this extends). I wasn’t convinced by D.S Wilson on the topic many years ago but it’s not a main interest of mine… but I know who Williams, Trivers, Hamilton, and Axelrod are with just a lot of dust on my ‘knowledge’. My mentor has written a paper on eusocality and humans. If I have you right, I’d mention that people from a lab in Austin recently published a challenge to something I wrote ;^0.
At any rate, I like the idea of a small library!