This is in part some naming annoyance. Bitbucket let you once use your own domains for repos. Which was nice as you could migrate if you wanted.

The forks thing could be tackled. With a notification, something like I forked you. Or a code search engine which is clever enough to detect and link repos.

The user management gubbins, is the normal irritation of user management and access control.

The stars part is already a bit of a horror across all software - not knowing how to gauge the popularity and quality of a project. Nevermind searching for it.

I'm not the biggest user of these silo repos, but I do appreciate that thin barriers to entry, and improved usability or a good usability wrapper, is charming.