The dividers for Scrivenings have changed from black dashed lines to more subtle gray, dashed lines. As always, you can change the appearance of Scrivenings, but those options are now located under File>Options>Appearance>Scrivenings.
Also, when the option to view titles in Scrivenings view is turned on (View>Text Editing>Show Titles in Scrivenings), the title size adjusts to indicate its position in the Binder hierarchy, growing subsequently smaller for lower-level items.
You can adjust the size of the title fonts in File>Options>Appearance>Scrivenings under the Fonts tab.
For some of the new features related to Scrivenings view, check out Scrivenings Titles, Bookish Display, and Navigation.