"the Revival overlooks the creative role of individual singers"
The revival certainly does not overlook the role of the individual singers; we get our examples from the Sam Larners, John Strachans, John Reillys and Sheila Stewarts - but we have no idea how to differentiate between the influence that they have brought their songs and that of the many hudreds - thousands even, of unknown mouths that the songs have passed through, though we know for certain that this 'process' must certainly have had an influence.
Please don't spoil a potentially interesting point with loaded nonsense such as "semi-random, semi-occult Folk Process".
Jim Carroll