Who knows. I live in the land of the "pasty-white, green-haired crazy identity left" and "backslick, pompous, pretend-to not be fascist right", so I have a certain amount of dislike for extreme views, one or the other.
In this instance, I take no issue with the wish for diversity, but the fact that it appears to be diversity simply for its own sake and it completely collides with the setting and canon as the character in question has two very famous and important, and very white, parents.
What is your opinion on the idea that the purpose of this change could be to improve the readability of different factions? If every faction is depicted as Scandinavian looking white individuals, divisions between groups are more likely to get muddled for the viewer.
The Witcher books (and games) depict Elves and Dwarves as the oppressed and persecuted minorities of their world, and it's a really clear-cut class society with a large peasant class. The architecture and overall style of different nations are also quite varied. But, once again, the main issue with changing this particular characters appearance towards a different look is her lineage in the canon of this universe. Regardless of whether or not it's fictional, it's still a huge issue, and the writers would have to change an entire faction/empire and their looks and possibly culture to fit this narrative. It's just not manageable without losing the sense and weave of the entire world depicted. Look at Game of Thrones, all the major houses (and minor ones as well) in Westeros are mostly white folk with fairly similar build, but telling factions and cultures apart is very easy most of the time. It was simply never an issue.
The fact that writers feel that the only way to represent or diversify is to have minorities artificially supplant characters originally of a different ethnicity, says a lot about their skill and willingness to construct a diverse cast that makes sense in the context from the beginning.
PS: I actually refused/refuse to see Gods of Egypt due to the ridiculous casting decisions.
End of 2016 hardware sales:
Wii U: 15 million. PS4: 54 million. One: 30 million. 3DS: 64.8 million. PSVita: 15.2 million.