I was looking for something like this too because it is crucial for the student to see the feedback. At this time, I came accross a block by Joseph Rezeau called Lesson Essay Feedback: https://moodle.org/plugins/view.php?plugin=block_lesson_essay_feedback. It seems to work though it would be best if something like this would be integrated into core.
The way it basically works is that you install the block on your site and then in your course you add another block on the left or right hand side called" Lesson Essay Feedback".