Although being a moultoneer myself, I am somewhat worried that moulton bikes are not keeping up with modern technologies for a long time. In 1960s, moulton bikes can compete with mainstream road bikes of that era. Nowadays everything evolves fast, but moulton bikes haven't changed much from 1980s, in material and technology used.
Compared to modern MTB suspension systems with tons of options, moulton's front and rear suspension is prehistoric. Spaceframe look cool, but I doubt it is any more rigid than modern high-modulous carbon frames that weigh only a fraction of moulton frame. And moulton does not provide any quality wheelset that can match modern carbon wheelsets.
I think it is about time to resurrect the monocoque moulton idea. The frame should be made by carbon fiber, as light and aerodymic as possible, and using industry-standard suspension unit. It may be slightly heavier than today's 15lbs road bikes, but should be more aerodynamic , comfortable, and nimble. With such bikes, now we can compete with mainstream road bikes again.