It would be good to have linked areas in the Wiki for at least the Highlight(see the link for the PRs for writing references) bullet points. The release is imminent and the Translators need time to work too.
I do not believe the macOS package maintainer monitors the forum. Sent an eMail inquiry.
John replied.
PIP is not in the current 5.2 .dmg file and there probably isn’t time to resolve the anticipated obstacles:
Writing into the bundle isn’t permitted so it would have to be fiddled to do only user installs with site.USER_PATH hardcoded to ~/Library/Application Support/gramps/python/x.y/site-packages.
The pip “executable” is really a shell script that shebangs the python executable. Gramps.app’s python executable is hardwired to run https://github.com/gramps-project/gramps/blob/master/mac/gramps_launcher.py so I’d need to figure out a secure way to run the pip module.
Those types of things have been listed under the GUI section. (Which are extensive.) The highlights are just the highly leveragable functional changes.