Disowned Adaptation: Le Guin's response to the film can be found here. In a nutshell, she thought the film suffered in comparison to her own novels and that is was overly violent and preachy, and that the characters are too white (which is a serious issue for Le Guin), but that the movie was merely dissatisfying rather than outright bad. Given Le Guin's vehemently negative opinions of all prior attempts at adapting her work to other media this can be interpreted as getting off lightly.
What Could Have Been: Hayao Miyazaki offered to adapt the book in the early '90s, but Ursula K. LeGuinn, not being familiar with his work, turned him down. By the time she watched his films and became convinced he could do justice to the book, he had retired and she had to settle for his son.