It’s currently very difficult to version control between a test universe and a live universe via package links. My game has many sub places with shared code which uses package links which allows us to save hours manually porting code to all the identical scripts. The issue is that if you publish a package in the test experience, it will publish to packages in the live place, then if you want to hot-patch the live experience it will go live with the test server updated package links.
It would be AMAZING if there were experience level package links that only update content inside of a specific experience.