Our contributors need to prepare theirs posts using the functionality to save them into drafts in wordpress.
But currently there is no way to differentiate ready to moderate posts and still working on posts : both appears as drafts.
The functionality we need just need a new post status in DB : "ready to publish" and a new button to propose a draft as a post.
I think that it might be usefull, regarding the fact that contributors can't publish without being moderated.
It does'nt look so hard to develop too.