I adore the idea of a Fran that is more obviously made of corpses. Her appearance lining up a bit more with the original novel would be so nice, but it should probably be noted that Fate does take a different approach to why Victor abandoned Fran and deemed her a failure to go with the change in appearance. Fate’s Victor deemed her a failure as a result of several things rather than just her appearance. Her inexpressive nature paired with a childlike mindset were specifically noted. (1/2)
It's definitely a choice, and while I don't specficially hate it, I don't really... like it either?
I already talked earlier about my slight issues with Victor's portrayal in Fate, but I don't like how the rejection of Fran was changed due to just how important the idea of 'superficiality' was in the original novel. The conflict between the Creature and Victor wasn't the only conflict in the book. It was the main conflict, sure, but there were around 5 whole chapters in a row detailing that it was her versus the entirety of humanity, not just one dickhead scientist. Making Victor the only reason for her hatred, instead of just the source of her creation that exposed her to said hatred, is an incredibly reductive take on the novel in Fate’s case. The Creature is naturally kind and childlike in the book as well, but slowly finds himself growing more hateful and more jaded as he's exposed to more hatefulness from the world. He's young and impressionable, and finds himself with the worst situations to impress upon.
He leaves Victor's lab, and is instantly awed by the beauty of the world. He tries to sing with the birds, but flinches because he's still learning to properly talk and his voice is rough. He's basically a little kid who got to run around a playground during recess.
...And then he gets shot after selflessly saving a girl from drowning. There's a whole conversation between the Creature and a blind man, where he had been helping the blind man's family without thanks for a few months. The Creature had been watching them, admiring what they had, learning while they learned, building a moral foundation as he sympathizes with their struggles in poverty, and relates to the persecution to the American Indians, all while stewing in his own pit of self-loathing. And when he meets the blind man, he has a perfectly civil conversation where he just sort of... vents, is reassured by the blind man that people are naturally kind and unprejudiced, and is then instantly shown the inverse when the man's family returns and he's chased out and beaten up.
And so, he's forced to accept the fact that it's not just Victor, but that nobody will even give him a chance as long as he's... y'know, him. And he hates that. Despises that. He hates himself and Victor so, so much so that when he learns William is Victor's brother, he strangles him without remorse, and actually feels joy at the act. He finds Justine, and decides that it would be fun to stir up some mischief, and so plants evidence on her that gets her executed. He starts lashing out with hatred because he realizes he's truly alone, and hunts Victor down because Frankenstein is the only one who can fix that. The Creature doesn't like being hateful or evil, but, just like most people, develops a sort of karmic mentality. Humans were cruel to him, so he has every right to be cruel to humans.
And the thing is that making Fran traditionally attractive and cute undercuts that, because now she just reads as sort of 'weird-looking and quirky'. Like even if she was seen as 'strange', she's not monstrous enough to shoot on sight. It's also stated that she was just as eloquent as she was in the novels, and the only reason she makes 'uuu' noises is because of Madness Enhancement, but like...
So, she's a cute, small, slightly quirky girl who had all of the eloquence of the original Creature (who was absurdly eloquent)... and you kind of start to see where it all falls apart.
I could ramble for even longer, but the TL;DR is that: The Creature in Frankenstein is a representation of the inherent goodness of humanity, and the evil that comes from humanity when faced with prejudice (the Creature's appearance). The novel also emphasizes that lonliness is an incredibly dangerous and essentially 'evil' concept, and making Fran conventionally cute completely kneecaps one of the core concepts presented in the souce material, when they could have kept it and added so many more layers onto her character.