Regarding oref0 and OpenAPS overall - yes, there is still work ongoing.
This PR shows what's currently different in the dev branch vs the main branch, and we've got plans to work on a release in the near future with folding in some updates to fix the parse time issue people have been bumping into on fresh installs. After that release, there may be some compatibility updates for future Nightscout changes, and there may be some additional algorithm work once we do some simulator back-testing on some of the feature changes people have been running individual tests on.