Update (and replying to my own post...strange)

I Did contact Brompton regarding any updates to the rear hinge pivot 2010+ and here is the response straight from the horse's mouth:

Thank you for contacting us here, at the Brompton factory.

The manual for the 2018 model bikes has indeed changed from the manual from 2010. This is due to the constant development of the bike and consequently, all manuals we provide with a newly built bike will be specific to its build specifications and manufacturing year. Regarding your enquiry about the rear hinge, the bearings of this part have changed since 2010 and nowadays this part is made from self-lubricating material. Please follow the instructions of the manual which was provided with your bikes as both bikes are new models built in 2018.

So, apparently lubricating the newer hinge points isn't needed/recommended/necessary.