Not sure the last 'improvements' were for reliability - more for cost reduction?
There's nothing wrong with a belt drive.
Don't see many Super3's here in France but there are a couple in Northern departments, Nestor will know them all.
any modification is a cost, knowing it ain't a big seller, I doubt changes are made to build it more cost-effective
if they could lower the price by 15K £, sales would probably improve, but that would mean overall cost-cutting or re-negotiation with the suppliers