I reckon there are two ways WGT could compensate for the shock-horror loss of Oakmont - and having double pins for every hole/course is certainly one of them.... (there are no multiple pins - only double pins - and the mixture between them depends on the easy/medium and hard setting).
The other way would be to make Cabo and Whistler free and available for CCs.
Those two things might go some small way to compensate for losing Oakmont and the manner of its loss (i.e. overnight, with no warning).
But will WGT oblige? A rhetorical question.....
I did manage to get a semi-confirmation once that double pins are available for RSG - and I would presume, in theory, for the later courses too. Strange that Merion got the early honour of double pins.