Mandy seems to encourage Ella to play The Long Game about her gift of obedience, to find ways to subvert it rather than find a cure. Then again, she also explains that fairies can't undo Lucinda's blessings.
Char understands completely when Ella explains she's cursed. Then again, considering that Dame Olga and Hattie lied to his face about Ella being "Cinders" the scullery maid and openly saying that Ella must obey her, he also saw their cruelty upfront, along with Olive saying, "Marry him and give me all your money!" His reaction is borderline This Explains So Much.
Hattie never marries, but Olive does. Considering that Char discredited and ruined a teacher that made his little sister cry, he may have sent some rumors along about Hattie's blatant cruelty to avenge Ella after she's able to explain the whole situation. Olive is more stupid than mean, so Char lets her off the hook.
Lucinda's gifts seem horrifying enough when we see how compulsion and obedience ruined Ella's life from when she was a baby. Then we find out in Fairest that she gifted people with a magic mirror where its inhabitant convinces them to either commit suicide or become so hated that others kill them. This has even started wars and destroyed countries In Ogre Enchanted, she curses a girl for the crime of turning down a childhood sweetheart, thinking she was vain. How much of a body count does Lucinda have with "big magic"?
The fact that the other fairies can't undo Lucinda's magic. They try to no avail to advise her to not gift newlyweds. Is there no fairy government or society that could punish her?
The absolutely horrifying potential for abuse that Lucinda's gift of obedience opens Ella up to. If her main Love Interest wasn't, well, Prince Charming, and if she had been married off like her father had wanted, what could a less-scrupulous man have done? For that matter, there are a lot of other horrific things that the book didn't quite approach which could have happened.
In the movie, Ella manages to get rid of her "gift" by telling herself she will no longer be obedient in a mirror. How had this idea never occurred to her before? Then you remember her encounter with Lucinda earlier, where Lucinda tells her to "Get rid of [the gift] yourself." We see earlier in the movie that Ella can do things otherwise impossible if she's ordered to (ie. when she is told to freeze, she literally freezes in midair). In order to obey the order, she was forced to do something otherwise impossible (rid herself of the gift).
