Spoiler for the novel
When Edith gave up hope, she returned with the knights in a sorry state and was taken to the execution ground without even questioning her of her involvement. The Duke was ready to execute her when Killian arrived and the Duke gave him the right to make a decision of Edith. Killian said those lines from the original novel, that every Riegelhoff deserve to die because of their crimes and then he said, my wife is, btw, a Ludwig. Then he talked about his investigation, there was chaos, Edith's hood fell off, they saw her injuries, even the Duke was surprised, thought that Edith was attacked after running away from the castle but Killian said that she sustained those injuries while in the caste by the maid and her brother, and the Duke eventually decided to put Edith to prison and continued with the execution. After Edith was taken away, Linon arrived to testify for Edith and the maid also the truth about Edith's lineage and her being a dog etc. Killian later also saw her bag, that she only carried a utility knife and a compass with her and had some sweet potatoes like the beggars and cried. It was a really good catharsis.
These changes take away so much, not just from Edith's character but from the others too. One example is Cliff. The main characters were all heavily under the influence of the author, Cliff the most, but even so, it was Cliff and only Cliff who saw through Lize from the start (but decided to help her anyways), not the Duke, the Duchess or anyone else. The other one is naturally Killian. Here, he was practically powerless and it was the princess who saved Edith. The princess who interacted with Edith 3 times or so...and Killian's great moment is gone. Not even talking about Linon, the witness, who should've brought the decisive evidence. He is the prime example of Edith's approach of constantly interacting with the extras as the only successful method.