Disney's Frozen is a testament to how many ideas were wasted. And how little in common it has with the source material.
If you read it's inspiration, "The Snow Queen", by Hans Christian Anderson, you can see just how little in common Disney's Cash Cow has with that fairy tale. The fairy tale had so many elements that for some reason, Disney either removed, or changed so much, it might as well been removed...
A grand adventure, worthy of The Hero's journey, not just through the snow. We Start out with our two protagonists. Two youngsters named Kai and Gerda. A Boy and a Girl.
A grand scope of different visuals. A working class village, a vast and colorful flower garden, a grand castle with moving shadows of dreams, a golden carriage, a decayed Robber fortress, a reindeer ride under a sky lit up by northern lights. An Ice Palace.
You already have two characters of equal importance that Disney could have used to appeal to both girls and boys.
Plus, with Kai loving Roses and not being bothered with being best friends with a girl, something taboo in 1844 when the original fairy tale was written, Disney could have been bold and encouraged boys and girls to be platonically intimate, and they could have told boys that it's okay to have feminine interests, to be softies and that you don't have to see every girl as only a potential romantic partner.
For Gerda, you could show girls that you aren't forced to see boys as only romantic partners, and you could have made Gerda a Tomboyish Disney Princess, given her adventurous spirit, determination, and her willingness to get her hands dirty, while also contrasting previous princesses by having her be working class, and not being the damsel, but instead the rescuer, for someone she knows well and loves platonically already, instead of a prince.
Although if Disney decided to make them a couple in adulthood, you could at least make it a "Childhood Friend Romance", not unlike Simon and Nala.
If Disney wanted to poke fun at the "You can't marry a man you just met." You can counter it by having Gerda and Kai, as mentioned before, be adults that know each other well from being childhood friends, thus knowing each other and having a healthy relationship.
In the original fairy tale, Kai gets kidnapped by The Snow Queen. Gerda is the girl saving the boy in this case. You could show boys that it's okay to need saving, and it's not a weakness to need help. Plus Disney could have made jokes where they point out the gender reversed damsel in distress scenario.
For Gerda, you could also show her receiving help, to show a woman being helped out by OTHER WOMEN, and that it's okay to not be perfect and that you don't need to be a lone wolf.
Disney had a great roster of female characters from various walks of life, all of whom have their own goals and agency. More detail is made on another person's blog here. In short, Frozen ends up ber much LESS feminist friendly than the source material.
Plus, the fairy tale had a lesbian coded robber girl! Whom Disney could have made into their first openly gay female character.
The Snow Queen could have been a mysterious anti villain whose goals are intentionally made unclear. To contrast with previous Disney Villains.
Nobody dies in the original fairy tale, so you don't have to alter it much.
You could still emphasize the importance of platonic love. in this case, between a boy and girl, without them being related.
How did Disney reject all of those ideas? How did it take them since the 1930s to try and adapt this story? It was like they were presented with a bottle of high quality vodka... That they proceeded to water down, until the vodka gave up and turned itself into lukewarm water. Why Disney? Why didn't you use any of these ideas?
