The subducted East Pacific Rise may be followed by the hot spots
which usually form on such rift zones. There are several theories, one
of which I noted and another of which you have mentioned. The San Andreas
fault zone is a series of strike-slip faults which may or may not have
any relation to the east Pacific Rise. The answer is in the eye of the
beholder on this one.
I don't know where the subducted Farallon Plate is - any guesses from
anyone would be welcomed.