Yeah the article here is explicitly "10 Best New Features" and so doesn't explicitly include improvements to old features, and clearly doesn't represent the breadth of changes in the Windows release.
The easiest way to find hints about just about every change made in the update is probably to browse through the Windows Insider blogs. They are quite detailed and rather intimate looks into the changelog of Windows over time. I don't know if anyone is building a good summary of everything that changes. Some of the area-specific blogs will do summary posts just before the release of everything going into the release; in particular I'm thinking about summary posts I've seen from the Windows Subsystem for Linux team (biggest tl;dr: multiple distro support, side-by-side distro-support, no need for Developer Mode anymore, just download distro(s) of your choice from Windows Store) and Windows CLI/CMD.exe team.
As with each previous update, more Settings have incrementally moved to the modern Settings app, per your point 2. That likely will remain a slower process than everyone would like (there are a lot of Windows settings), but they continue to work on it.
I can't speak to most of your other points as they've not been personal pain points for me; I don't do most of them often enough to notice.