A few things could be good to know about this release.
Please correct me if I'm wrong about any of these points. I'm not an Office developer at all. :)
Reauthentication if using multiple services
At least if you're using the tools in an Xamarin Ios app. As long as you're using a single service, you're fine. BUT if you decide to use, let's say Contacts and My Files in the same app then you will have to reauthenticate each time you switch between them.
Getting a folder structure in My Files
Nope, doesn't work. In the preview you could rebuild the structure by using part of the Id of each item returned. This has been changed and there is no way to retrieve the folders in a structured way. You get all folders without them being related.
Updating from preview to live
1. Uninstall all the nuget-packages
2. Add the new packages by right clicking your project, select Add and then select Connected Service.
3. Remove all the permissions or it will fail when you hit OK.
4. Click OK (nothing will happen)
5. Add Connected Services again and reset all your permissions.