I suspect that marketing forces and competition will eventually convince VW to do a California on the new Transporter. It's so obvious: the Transporter is smaller and easier to park on the outside than the Multivan, while being much larger on the inside. As my snowy ski weekend in the Pyrenees just reminded me, the Transporter's higher ground clearance is decisive, and if you find yourself fitting chains (my Michelin Agilis Crossclimates meant I didn't have to), you will see the difference. I think campers will vote with their money and feet. Maybe there's room for both, the Multivan California for city and day trips and a Transporter California for people who get more out into nature, but the Mutivan California Ocean/Coast price and equipment seem excessive for its limited use as a day van. The only one that makes any sense at all with this generation’s more limited space is the Beach, with its flexible use of space and usable lower bed.
This could all change if the new Transporter really has a Ford motor with the dreaded wet cam belt, but I'm hoping VW has enough sense to avoid another 180 biturbo fiasco.