Interesting read, thanks for sharing! I’m only a little acquainted with either the PbtA non-family/non-philosophy/etc, or with the Dark Sun setting – yet here I am flapping my gums anyway! Do you have particular area of concern? I did see this piece of self-criticism from the author:-
‘It is probably too-D&D or “rules heavy” for the real AW crowd. And it is probably too “Indie” (or whatever) for the D&Ders.’
Certainly the booklets look pretty richly textured, and the mechanics look significantly different from the PbtA ‘norm’ – is there even a PbtA norm? – in particular the 2(or so!)d20 mechanic for equivocal success is an interesting plot twist. (Not sure if it’s original to this particular PbtA game… there’s a whole lot of 'em out there!) From the internal narrative it’s a revision of – or is at least aware of – two earlier iterations, and claims to have seen tabletime at least in their own group. I’m not seeing a lot of discussion of it elsewhere, though…
If your preference is for a more ‘orthodox’ take, I also happened across this, which appears to be drop-in booklets for otherwise standard DW:-