I think you have the right idea ratchet.
Rod Stiff didn't slay the market by building another Thruster or lightwing. He knew that pilots wanted aircraft that were less limited in speed and range. He knew the vital importance of designing the product for economical repetition manufacture.
Rod didn't blindly accept multi-strand control cables and the complexity of pulleys. Why join little bits of metal at great labour cost? Better to make a mold and use a readily available, well proven and easy to use composite. Dual poles on a single pole mechanism? Lets do it!
Rod used an innovative series production plan , with each subbie putting up his own operating capital.
As a result of his innovation, a punter can hand over sixty thousand or so at opening time at Bundaberg and be at Wagga by 4pm.
To sum up... Jabiru produced the definitive cheap to buy and operate two seater....... by aiming higher.
Low and slow, limited scope flying....real ultralighting, might well have a continuing appeal. I don't think its future will be based on the sailing boat structures of the past. Due to the continued urbanisation of farmland, quiet running electric powerplants seem like a fair bet. Bucketloads of corporate dough is being directed into elec. powerplant research. As an example, Lithium- Ion motorcycle batteries, new to the market, are almost weightless. Yes, they have problems, but there is a trend. I personally love two-stroke powerplants. Hell, I recently hotted up a DT175, no less! But..... the fuel burn of a 582 just isn't on. That is not cheap flying.
I think the first job is to find a better powerplant, rather than accepting the easily obtained, barely satisfactory, obvious choices.