If you've got some free holiday time, the v6 repository mode is now available in many of the daily builds, and there's documentation at unlocked files. It would be very useful now if you can give it a try. Use a clone or new repository for safety.
Yesterday I checked all parts of the code that special case direct mode, and found a few things that needed adjusting for v6 unlocked files. Today, I added the annex.thin config. Around 4 other major todo items need to be dealt with before this is ready for more than early adopters.