As a result of a change of plans, I started to implement the reordering tab last week. That is: I decided to implement all the functionality before doing usability testing with the actual application. This was due to the fact that it was not easy enough to get teachers as usability test subjects during July. Instead of hunting, I decided to put my energy into implementation.
Thus, the question ordering/paging tab is well underway and will, if all goes well, be finished by next week.
The feedback from the Moodle community about the demo published last week has been very positive, though I have gotten some very interesting development ideas, too. So that is something to be glad about! :)