As an owner of a 2016 T6 Beach 150ps manual I have only briefly glanced at this thread from time to time thinking that it only effected new unregistered vehicles. However, IF VW have discontinued the 150 manual and there now seems to be some doubt as to whether this model will ever be sold again in the future, then there must be something pretty seriously wrong with the current 150 manual set up. Otherwise they would bring out some form of upgrade to solve the issue and then recommence production.
Your post states you where told that, "This vehicle will now never be registered for use and is scheduled to be returned to Germany either for reconfiguration or disposal". Pretty disturbing stuff if true.
So IF true, I am now wondering what VW will have to do about all of the already registered T6 Transporter based passenger carrying vehicles. IF this problem has only just been discovered then it suggests to me that it may have been there since the start of the T6 production run. I am certainly not aware that the T6 150 manual has undergone any udgrades since the beginning of production. VW can't ignore these vehicles because IF the 150ps manual doesn't comply now then surely it didn't from the start of production. IF that's the case then they were misrepresented at point of sale. Therefore they will surely have find a solution. Since the problem appears to be serious enough to warrant the removal of this model from production then a quick fix doesn't sound either likely or possible.
IF I've got the correct measure of this situation then where does this leave current owners of already registered T6 150 ps manual passenger carrying vehicles? A free fitted new replacement dsg gearbox, or a new replacement dsg Beach? I am pretty certain that neither of these options are even remotely likely but surely they will have to do something to rectify this situation? IF I'm right, compensation won't fix the route cause of this issue either.
I know there are no firm facts at present and most of this is speculation but IF what you (Jenko) have been told by VW proves to be true then the whole issue may well have much wider ramifications.