I think it would be really useful to add the content types find the hotspots into the Question Set.
I would give much more diversity in the Question Set content type.
I myself would love to use it to make topographic questions where the user has to click the right location on a chart of a country. I tried the column option but i disliked this way. My students are in the age of 6 to 12. They need to see one task at the time. And not have the ability to scroll down. It is distracting for them. (as i have found out)