Currently, when a user completes a scorm object quiz, (at least when opened in a new window) the scorm object closes correctly, leaving the user with an uninstructive screen. I'm looking at this from the perspective of using moodle for language courses and non-english speakers.
The way to exit the page and return to the course homepage is to click the exit activity text link, or use the breadcrumbs.
(See attached screenshot)
That's fine for people who have the patience to read and assuming these strings are translated.
However, a nice big 'get me out of here' button would be a great improvement. To keep it (visually) simple.