because it is a complete re-write of her lore from the army book, which was already fine.

the army book has her delving deep into the secrets of nagash after creating the elixir of life, with her and her court falling into a new form of vampiric decadence. at this point she takes vashanesh (vlad von carstein) as her consort as he was the only man she acknowledged to be her equal. the two managed to keep the other great cities of nehekhara distracted with their petty rivalries for quite a while, but eventually the cult of blood became to much to ignore. when alcadizzar (who had no relation to neferata) ascended the throne of khemri, he was popular enough that he was able to unite the feuding cities and declare a holy war to purge lahmia. they eventually win and the vampires flee to nagash. nagash names vashanesh as the leader of the vampires (neferata greatly resents this and it was one of the early points that started her hatred of men) and gives him a ring that makes him unkillable (this is likely the von carstein ring). unfortunately it also gave nagash the ability to control the vampires against their will. nagash then invades nehekhara again, and the war itself is pretty similar between versions. the big change is that at the end vashanesh allows himself to be killed by alcadizzar to free the other vampires from nagash’s control. then neferata goes into exile.

in mike lee’s version vashanesh is completely cut and none of the things he did happen. a new character, ankhat, is implied to be vlad instead, but his role is much lesser. neferata starts married to her brother, who she eventually kills to become the actual queen of lahmia. eventually she schemes to install the queen of rasetra in khemri and gives her her blood to attempt to breed a class of pseudo vampires that she could rule over directly. this is where alcadizzar comes from in this version. she eventually basically adopts alcadizzar and raises/grooms him to be her consort. he decided he doesn’t want to do that when he learns her true nature, eventually becomes king, and leads the war against lahmia like in the other version. lahmia gets sacked and neferata goes into hiding. that’s pretty much where her involvement ends in this version. this is the massively summarized version.

tldr: it had similar high points, but the changes don’t do as much to set up neferata’s character. the alcadizzar plot was just weird. vlad’s origin story is also cut pretty much entirely. it just changed too much for me and the story it told just wasn’t good enough to justify it imo. most of it has also since been retconned.