Currently if a lesson has a cluster in it, the preview tab will always show
"An Unseen question within a cluster jump or an Unseen question within a content page jump is being used in this lesson. The next page jump will be used instead. Login as a student to test these jumps."
This really isn't a complete preview. There should be a proper answering session going on so that attempts are actually made against a fake 'preview' user. Teacher should not be required to login as another student. How many accounts does moodle require a teacher to have? it should be one.
I'm sure elsewhere in moodle (quiz?) there are 'previews' that are not fully functional previews as well. They should be extended too - somewhat similar to technically to a unit test's setup & tear down.
This would be a great improvement!