Hi Mike,
Thanks for replying to this thread!!
I can see you point where the answer the student selected might not be their final decision, but we've had complaints where the students would save their responses and come back thinking they could hit "submit" later on. When they missed the deadline, we'd have to reopen the questionnaire and wait for them to submit it (which runs the risk of other students accessing the questionnaire and submitting late). Then there is the waiting game, so if we open the questionnaire, there's no guarantee the student will come back and submit their saves responses.
The instructor also wants to see the what the saved responses are, but are unable to see them. But the instructor can see that the student started and saved his/her response.