In the old release editor, after Enter Edit for the new release, it was possible to go Back in the web browser and have all that data still loaded. After supplying the Release Group and choosing a Release Duplicate, this was a quick way to create multiple editions of a release.

In the new release editor, going Back after entering a release goes to an empty release editor, so everything on the Release Information tab has to be re-entered. IMO this is a "regression"