This looks interesting. I was not aware of Matt's version but he was cool enough to playtest Osseous, my first stab at writing "a system", using Ray Otus' solo rules.
Looking forward to playing around with this one.
Otus did a great job to streamline the concept of Mythic GME, but I prefer the more easy approach of Tiny Solitary Soldiers, but also a little bit of crunch of the Recluse oracle (since FU oracle used by TSS has a boring distribution). It’s a pure matter of taste, I guess. Let me know the results of your play session when it is done!