Idea Delivered

This enhancement is included in the new Publication Editor that is available as part of the Tridion Docs 15.3 release.

There you have an overview sidebar with versions and a dialog that allows you to manage versions with the preview and compare.

You can learn more from our bootcamp recording:  Tridion Docs 15.3.0 Bootcamp 7 of 7 - Publication Editor  

Draft Space to inform about newer versions

I am not sure if it is a bug or a feature ;)
In Draft Space, I am working on a publication which uses version 1 of a topic. The topic is released, and I click "new version", and it jumps automatically to the already existing version 2 of the topic (which I didn't know), without any information about what is happening. This is confusing to our users, as the version 2 was already in state "Language review" instead of "Draft". Some notification that now version 2 is used in the publication would be good.