For any new owners with a Cali and tempted to refused the vehicle - personal opinion - see if VW come up with a fix if you still have time within your rejection period. I'd certainly make your position clear to VW - but dont pull the trigger unless you feel you have to.
I really feel for each and every owner who's had a crummy start to VW Cali ownership. We had a fantastic start to ours which has only improved each year. Had we had a poor experience from the outset, I'm sure that would have changed; but we'd have missed out on the best vehicle experience we've had to date (ex-petrol head, traded everything in for a Cali Ocean). But at the end of the day, this is down to fabric choice / stitching / etc. It's not the vehicle itself, but a single part which can be replaced.
Naturally do what's best for you - but if you are able to hold off for a fix, i'd definitely recommend - our ownership has been a brilliant experience, and if VW do sort it out (cant see why they wouldn't - this is going to cost them a bomb otherwise!), you'll have a brilliant time.