Cross-property Copy - You can now copy resources from one property to another. After selecting a resource and clicking the Copy button, you can select a target property to copy to. This is available on Extensions, Data elements, and Rules. Read more about copying resources here.
Revision Compare - You can now compare one version of a resource with older versions. This is available on Extensions, Data Elements, and Rules. Read more about this new feature here.
Builds should be running ~15% faster than before. Large builds (hundreds of resources) will have more dramatic improvements.
Enters Viewport event is now configurable to trigger each time that the element enters the viewport instead of just the first time.
Custom Events can now contain extra contextual data that can be used in conditions and actions.
Link Delay on the Click event will now trigger on descendants of the anchor and not just the anchor itself.
Properties that are configured for Extension Development now have a small tag next to the Property Name.
OrgID is now available on the _satellite object.
Use of the Launch UI is no longer supported in IE11, you'll receive a warning if you login with IE 11.
Better support for long Library names in your Active Library and the Publishing view.
In certain scenarios, when you saved a library, the dependency checker would prompt you to add a new revision of an extension that was already in your Library. It doesn't do that anymore.
Tooltips will now reliably show up in Safari.
Searches in the search bar will now trigger a bit faster than before.