The eugenecis can be retconnected easily. Let's say the sorcerer-kings have been playing the role of mad scientific, and with the secrets of the lifeshape craft they have been experimenting style "Resident Evil", and the fact some extinct lineages have reappeared thanks mutations. Other new lineages are also products of these experiments and mutantions, and the masterwork is the secret lineage of the elans. For example an elfling could the fruit of a halfling marriage, and both parents are 100% halflings, or a 100% dwarf marriage could be the parents of a mutant goliath.
Why should we ban or cancel when the retcon is an easier option? Let's not be too radical, please, in the name of the good sense!
The cartoon serie of the X-Men was about the racism, does it mean it couldn't be watched by children?
Nazis were very racist, then can't they be the villains in any +13 fiction work? Racism is totally wrong, but let's not allow a new taboo by fault of an irrational moral panic.
Now the classic Cobra commander can't wear his classic hood, because this is not politically correct. Please, he is the big bad guy!
Forget that stupid idea about only stongest ones can survive. In the real nature the most adapted ones have a better chance of surviving, and even then they need some luck. The dinosaurs were stronger, but they dissapeared when the circustances changed.
* Couldn't the rhulisti use the lifeshape craft to build "archologies" ( = super skycrapper buildings)? And then the city-states would be archologies. They could build using a material like bones instead concrete or stone.
* What if the Athasian Shadowfell, the "endless night" was a place of hope? the place of destination of lots of sentient souls without a "bad karma". Here they have discovered the way to farm "shadowtouched" plants, and these used to rebuild a civilitation. With enough time they could create divine effects as reincarnation, cloning or resurrection.
Maybe not only the sorcerer-kings know the existence of the faction of the "black spine" but also there is trade, because these sell water and metal from other places of the Athaspace.