I edited my comment to rot13 the ending spoilers; I left in the stuff that's more or less advertised as the premise of the movie. You might want to edit your reply so that it doesn't quote the uncyphered text.
Meridia learned to value her relationship with her mother, which I think a lot of kids need to hear going into adolescence. When you put it this way it doesn't seem nearly as trite as your phrasing makes it sound.
I think that's a valuable lesson, but I felt like Brave's presentation of it suffered for the fact that Merida and her mother really only reconcile after Merida essentially gets her way about everything. Teenagers who feel aggrieved in their relationships with their parents and think that they're subject to pointless unfairness are likely to come away with the lesson "I could get along so much better with my parents if they'd stop being pointlessly unfair to me!" rather than "Maybe I should be more open to the idea that my parents have legitimate reasons for not being accommodating of all my wishes, and be prepared to cut them some slack."
A more well rounded version of the movie's approximate message might have been something like "Some burdensome social expectations and life restrictions have good reasons behind them and others don't, learn to distinguish between them so you can focus your effort on solving the right ones." But instead, it came off more like "Kids, you should love and appreciate your parents, at least when you work past their inclination to arbitrarily oppress you."
Now that I think about it, very few movies or TV shows actually teach that lesson. There are plenty of works of fiction that portray the whiney teenager in a negative light, and there are plenty that portray the unreasonable parent in a negative light, but nothing seems to change. It all plays out with the boring inevitability of a Greek tragedy.
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