How Facebook handles user reaction is more important than even an FTC complaint. Certainly the new privacy setting changes will lead to some Facebook users sharing information more widely, and that warrants privacy scrutiny and debate. Other users may use the new controls to make case by case decisions about what they share. The key question is whether users are aware of the settings and whether they are using them.
So far, many users seem to be aware of the changes and are adjusting the privacy controls as they see fit. As people react to the new options, Facebook should continue to respond as they have done by continuing to add educational information and to adjust to ensure they meet user expectations.