It seems clear to me that, to paraphrase the old saying, the devil is in the detail-work.
Pacific is one of the most natural looking/found golf courses I've ever seen, but judging from JC Urbina's post the architect and his team did indeed do a lot of work there, and on many of the holes.
But, thankfully for those who enjoy both the aesthetic and the ethos of naturalism, the creative team seems to have developed (from photos, nearly perfected) the skill and know-how to hide their hands and cover their footprints -- thereby making the discussion about what the architect "did" almost (and in years to come I'd bet, almost entirely) moot.
Peter