(Just quoting you so that you it alerts you)
So as far as the public goes, the data sharing installation is not live yet. The support agent that tested it for me is using an internal installer that we don’t have yet, hence why it worked for them, but not me/us.
So to summarize the current setup (same as I posted above):
Currently the system is creating a completely separate install (like it used to) so there can be a storage issue.
However, it is copying the duplicate data from the live game over, thus 1) reducing the download size to very little, and 2) installing much faster.