Yep. Ashen Frontiers is my attempt at taking the genres Dark Sun represents and using then as inspiration for a new 5e setting. There's absolutely no reason to repeat past material as long as you get the feeling right (c.f. my
response on if there will be slavery in Ashen Frontiers). And I believe that 5e can definitely support more dangerous monsters and environments with appropriate adjustments. My work so far has made me very optimistic about what can be done, I'm just hoping enough other folks are interested enough to help the project come to life.