I think everyone needs to look at the initial pictures again. Remember you are looking at really big pictures of the coin. Which magnifies the hits and in some cases to the point of making them stick out. Then imagine seeing the coin in person under a 5x magnifying glass. I agree with the grade on this coin - maybe a few others I would argue about, but not until I see them in hand.
I think Leadfoot hit most of the it here, but he did not go far enough. You put his luster (one of the hardest things to photograph) along with Mark's comment about the size of what you are looking at. BTW, I think it may be getting worse before it gets better.
That's just how it goes. Do you have any lower grade slabs, like G to EF? These high grade MS coins are tough to grade with photos.
Sorry, but when you are trying for an uncirculated set, you tend not to have too many circulated coins in it. Not only that, but most circulated Lincolns are not worth slabbing. But, hey, most of the 66's, you (the plural version, not the singular you) have done fairly well on.