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Max,
This has been done intentionally, because this way news items get edited by the editor who is supposed to look at the articles that are submitted. Most of the time, a website wants to use a single style of writing and displaying articles, and this sort of ensures that a single person or editors group reads through the articles before posting them. So once again, this isn't one of your 'bugs' but a feature that has been thought through.
What we can and probably will do in the future versions, is add the ability to give editor-access to the news module (and other article type content management modules), thus, giving them only access to the articles admin, and not the module and category admin (now you get all if you have admin access to the module). That way, you can organise who gets access to what admin functions.
And maybe, we'll add the option to have the two fields like you request, but the previous feature I just described kind of defeats that purpose.
Herko