I mostly put it together to show my students that there's a steady increase in regulatory burden with the number of people you can kill in one go, so as you said, unsurprising.
On the other hand, a fair question is that given that a microlight exposes 1/800th of the number of passengers to risk, and has around 1/1000th of the mass, but has 1/16th of the amount of verbage to wade through in demonstration standard compliance - is the microlight being over-regulated?
On the other hand, how many words do you need to say "make sure that the wings don't fall off", whether it's a microlight or an A380?
It was an interesting exercise - I've not attempted to do more than fairly portray the evidence, but it creates some interesting debating points.
G