The whole controversy about the movie did seem predictable and to me rather boring.
I do find myself wondering if the rather upbeat ending was seen as a pleasant surprise by anyone. French "coming of age" films tend to have bleak endings more often than not.
I do see twerk dancing as a way of expressing one's attractiveness, because sexual expression by those who are verboten to express it is a way of rebelling and empowerment, even though the girls learned both the ups and downs of doing so, including the contradictions our society has with it. That was made clear in earlier decades with the "dirty dancing" phenomenon (remember that?). This includes simultaneously giving girls positive and negative attention ("likes" on their videos on the one hand; slut-shaming on the other), and how adult men can find them attractive but then realize they are not supposed to find them attractive once they discover they are 11. Nowadays girls, especially those in oppressive sub-cultures like the one Amy belonged to, have to rely on social media and their peers to learn the facts of life, since they are given no access to scientifically legitimate, value-neutral info in the course of their education and even the Internet is wrought with parental controls. That is how girls today are most often forced to learn, with the advent of social media being the usual mixed bag that new technology tends to be.
As a hebephile, my attractions also include young women of legal age, though Amy and her friends are right in my main AoA for either age direction. I did personally find Amy and her friends very beautiful and their dancing both erotic and artistic, as personally I am indeed attracted to displays of skin, taut outfits, and nimble movements that (to me) convey a girl's physical beauty and talent with movement. It is, of course, different for every MAP. For instance, a surprisingly high number of MAPs find erotic attractiveness and aesthetic beauty alike in girls dressed in Victorian attire, which was specifically designed in its era to give no hint of sexual attractiveness but simple "proper modesty."
I only found it starting to get a bit erotic at the very end, when Amy puts on some normal kid clothes and starts jump roping with some other girls. There's a girl acting like a girl... and that's starting to be sexy.
I guess the way I see it, is that pubescent and young adolescent girls are young women if I was to categorize them based on aesthetic preferences, if that makes sense. But as noted above, it's different for every MAP and teleiophile alike when it comes to attractiveness in matters such as apparel, mannerisms, style, etc.
Thank you for weighing in!