Having created the E3 General Information & FAQ for quite a few years now, I am quite familiar with e3expo.com. Thus I became aware of these files quite early on (in May 2019) and communicated in a closed environment with some friends within the media. Needless to say, they were not thrilled. I believe some contacted ESA about the issue but received little to nothing back. As has others mentioned.
The E3 website is a basic WP site with rather poor security. The more intimate sections, like the exhibitor section, are thankfully password protected but many other sections are not. Many external systems are utilized too, some that are very open.
Currently I am monitoring these domains and systems in preparation for E3 2020. Some E3 2020 related data is already available, but not in such quantity or quality to provide any greater details on how the show next year is going to happen. But I keep an eye on it and will report as soon as possible if any newsworthy developments happen.
Lastly, I think this whole situation is very appaling and a sign of ESA needing some great changes. I would even like to suggest that E3 perhaps should be put on hold for the time being until all issues have been worked out. Because it would be very unfortunate to see something like this happen again.