Ran,
I think BillV and others would agree that the pictures on the website are limited in what they show..
The dunes work in several ways. Yes, many of them are parallel, but not unnaturally so. For one thing, their slopes are tied into the fairway contouring, which is subtly accomplished. What's more, on holes like 5, 6, 10, 11, 14, 16, and even the somewhat controversial 18th (unlike most controversial 18th, it's controversial because it's underdone, not overdone), the dunes come into play strategically and will even create completely blind approaches if one is on the wrong side of the fairway.
As far as the titties, yes, a small handful of them look artificial, including the ones behind the par three 16th green. Being a lover of all things natural, I think that a few of them would look better without the silicone.