Agree, Tesla should provide more information on what has actually changed in each release, especially because they mark so much of the software as "beta".
We're all guessing on the status of the AP software in each release, and without any release notes, it's up to owners to experiment and figure out what might or might not have changed. Do we really know the areas where Tesla has or doesn't have confidence with the AP software?
nVidia does a pretty good job with the release notes for their graphics drivers - documenting what has changed in a release, what bugs have been fixed, known bugs that haven't been fixed, and warnings about situations that won't be fixed. All of that information would be very useful for the cars we are driving...