Additionally, v201705 adds support for creating ImageOverlayCreatives and new Partner companies.
For a full list of API changes in v201705, see the release notes.
With each new release comes a new deprecation. If you're using v201608 or earlier, it's time to look into upgrading. Also remember that v201605 will be sunset at the end of May 2017.
As always, if you have any questions, feel free to drop us a line on the DFP API forums or the Ads Developer Google+ page.