I resolved the OTA Problem (set_metadata_recursive: some changes failed) by flashing the factory Images without the Wipe command
Download Factory IMG: https://dl.google.com/dl/android/aosp/occam-krt16s-factory-2006f418.tgz
Unpack the file and ...
I think it will use the official USB Type-C alternate mode for DVI (with an integrated hdmi converter in the dex dock)
USB C Alternate Mode with DVI confirmed:
Supports DisplayPort over USB type-C. Supports video out when connecting via HDMI Adapt...
Hello i have tested it with a Nexus 4 on Android 4.3. It worked with the App Airplan Mode Toggle. It doesn't work with "Automalted" and "NFC Aufgaben Launcher" likely because these Apps try to use root.