The first Lilac RC is coming soon, and we have a first draft of the release notes.
You can view the draft on readthedocs.io at Open edX Lilac Release — Open edX Release Notes documentation
If you have comments or questions, please post them here. Or, if you like, you can comment on the release notes pull request in github, at https://github.com/edx/edx-documentation/pull/1939
I’m most interested in feedback on the format and scope of the release notes, but if you have questions about the feature updates in lilac, I’ll do my best to track those down as well.