I at least never expected Sofia Coppola to do something like this. You might have expected it from Emma Potter ... I mean Emma Watson. And she might be the best of the bunch, though the other actors do their best too. Still there is nothing happening you wouldn't expect (even if you are not aware of the story this is based on).
But as another reviewer pointed out, this is the feeling the movie wants to create. An emptiness, something uneasy while being as light as possible. It actually might be too light on some things and therefor the detachment might not work as well or better than expected. It depends on how you are watching this and what you're expecting to see. Even if you don't like the people who are "perpetrators" or the ones who are the "victims" in this (both again based on real people), it's tough to say this is not relevant to some extent ...
But as another reviewer pointed out, this is the feeling the movie wants to create. An emptiness, something uneasy while being as light as possible. It actually might be too light on some things and therefor the detachment might not work as well or better than expected. It depends on how you are watching this and what you're expecting to see. Even if you don't like the people who are "perpetrators" or the ones who are the "victims" in this (both again based on real people), it's tough to say this is not relevant to some extent ...