We are having issues with multiple content editors unknowingly editing the same blog entry or page at the same time and the changes get lost. There is no version control, check-in check-out features, or anything to let you know when someone else is working on a collection or blog entry.
Also, just saving a post to draft doesn't really check the story back in. The next person to edit the file and make changes usually loses all the changes they make if the original editor opens the file back up.
Right now it's irritating and inefficient to say the least.