Collaborative editing, like in Google Docs, has come to Confluence. Not just synchronous editing, but autosaving everyone's draft edits. You can even choose to close and save draft edits without publishing them, so you can resume team editing later. Publish only when you want to!
Bulk page hierarchy copy/moving allows you to grab an entire page hierarchy and create a copy of it somewhere else. This will help authors consolidate content or even use a current hierarchy as a template for a new one.
No moredocumentation theme. They've incorporated a lot of the documentation theme features into the default theme, so they've consolidated. Any space that had switched to the Documentation theme is automatically switched back to the improved Default theme.