cool, sounds like you are already thinking about and have answers to the questions I am curious about!
> Each GMS layer maps directly to a failure mode observed in the research
this is the part I was intending to double click on! do you have some writing on this somewhere? sometikes an architecture goes from overwrought to elegant only once you take into account the problems you're trying to solve, and at other times some more elegant solution is possible to the same problems.
and it's great that you've thought about scaling path. do you have some validation with your ideal early adopter profile? if not that seems like important feedback to get early (I'm not connected at all with block chain folks so I don't really know what they think is valuable.)