Most of these comments are about whose more feminine and bangable... So I'm not strawmanning.... Look at the comments saying one looks like a man and who's more attractive.
One character can ruin a story, yes. One that doesn't have any development (Rey in the sequel trilogy) or acts in a way that says they can't be touched or their pain is the only thing that matters (lead character in Gladiator 2)... I don't like when a character thinks they're better just because of their sex, male or female.
But is that what's doing on in Witcher 4? Is that what went on in Fable? Lack of character development? "Girl bossing"? What about those characters were or will be bad? I haven't played Fable and I still haven't finished Witcher 3 (lost my dang copy) and NONE of us have played Witcher 4.
But based on the tech demo yesterday, if Ciri was a man, would you have objected this much? Is it so much that she has a masculine face as it is that she's the main character?