Lack of information
I cannot find any informative documentation and no developers documentation or information about these export and import utilities. The code base is still very unstable and it would be great help if there is information about architecture of solution, project, data structures and classes. Currently it takes days to get things work on non-english context and still developers cannot be sure if they wrote hacks because there is no information they can use to validate their work."
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information