I am not following, what do you mean by "headline"?
I am sure I am not the only one who is annoyed by the long page when editing a document in the manager. How hard would it be to add a show/hide functionality to the headlines (Document setting, Document content, Template Variables, ...) so it reduces to the headline itself? Would be an easy way to get a more usable manager ...
I’m not quite sure if this is exactly what you meant but when editting a document you can go to: preview->save and refresh.
The other thing I really miss (I am used to it from Typo3) is the "save and preview" button ...
What do you think about it?