It has to be said that some of the requirements make sense and it would not be unreasonable for Morgan to incorporate them into general production. Nothing would be lost by incorporating the higher roll-over protection, head rest/padding, and high level brake light.
Part of the problem, I think, is that the ADRs do not cater for a 3 wheeler which is more car like than motorcycle like. Under the rules of many countries you must be able to see over the top of any windscreen (even on a motorcycle) that is not equipped with wipers. I think that led to the lower screen requirement in Australia.
The M3W indicators were always in a strange position and I have often wondered why they could not be mounted on the top of the mudguards at the front.
Regarding the "moustache" ; I do understand the need for pedestrian safety but an M3W is never going to match a car and in this case it is more reasonable to treat it like a motorcycle. A Moto Guzzi California, for example, is not obliged to be fitted with bumpers.