It took quite some time but Apple finally published an update that should resolve graphics issues while encoding Adobe Premiere Pro projects on the new MacBook Pro devices. Additionally, the update also resolves other problems and should improve automatic graphic switching on the 15" MacBook Pro.
This update:Here is a video demonstrating the MBP 2016 graphics issues:
Improves automatic graphics switching on MacBook Pro (15-inch, October 2016). Resolves graphics issues while encoding Adobe Premiere Pro projects on MacBook Pro with Touch Bar (13- and 15-inch, October 2016). Fixes an issue that prevented the searching of scanned PDF documents in Preview. Resolves a compatibility issue with PDF documents that are exported with encryption enabled. Fixes an issue that prevented some third-party applications from correctly importing images from digital cameras.
Enterprise content: Resolves an issue were network or cached user accounts (such as Active Directory accounts) using the maxFailedLoginAttempts password policy were becoming disabled.