A while back, I accidentally published a draft and now I fear I'll do it again, which is bad because I have many posts that are work in progress.
To avoid the accident in the future, I'd like to see an update to the 'publish' mechanism. Maybe it is a simple Lock  (checkbox) that is selected by default and makes the 'publish' button grayed out.
Alternatively, the 'private' visibility could be integrated in some way though I don't have a good suggestion at this time.
Please give it some thought.