Having skimmed through it, my impression is that SotDL would not have seen publication without major changes in the details. Certain aspects of it are just straight up implausible, like the SMs of the city states not knowing exactly what is going on in the Dead Lands. Put it this way - the medieval English may not have known what was going on in China, but they knew about France.
I view SotDL as apocrypha. A starting point, but in need of stern hand to bring it into proper accord with the Dark Sun setting. I’d like to see the 3.5 version by Athas dot org, or at least what has been done so far.