Here are some related usability issues in the quiz, from the student's point of view:
1. Do you have any comments on this proposal, which I am going to be implementing very soon.
2. There is a related issue where a quiz might naturally be considered to be 'Finished' even though technically more attempts are allowed. See http://moodle.org/mod/forum/discuss.php?d=189835. In this case, it might be appropriate to provide a 'Back to the course' link, as well as, and a bit more promenant than, the Re-attempt quiz link. (We may still wish to allow the student to re-attempt. For example, we may want them to return to the quiz as a revision aid at the end of the course.)
3. There is a question of whether the summary page at the end of the quiz attempt is always a good idea. In particular, is it really needed for one-page quizzes. Related to this, should there be an explicit 'Save' link/button somewhere on the attempt page, mainly to reassure students? (Since answers are saved automatically when you navigate to another page of the quiz.)
Can you make any practical suggestions about these issues?