Jason B.,
Far be it for me to second guess anyone like either of the Maxwells or the Carey family. Prairie Dunes' history and standing speak well enough for the club. Nevertheless, hindsight being 20/20, it can help to flesh-out some opportunities not present or available at the earlier time. As you know, the budget was a considerable issue when the course was built in nines with a 20 year gap.
I don't think it is known whether Press took his father's routing for the second nine and just executed the plan, or it if it was his own original work. With some 480 acres and "118 holes", it is reasonable to conclude that there could have been a number of opportunities lost to money, time, and Press' capabilities (I don't think that many would argue that the son possesed talents approaching his father's).
My comment regarding #11 was in response to your assertion that Press had less dramatic land to work with. We didn't have the time to go look at the land west and north of #11, so I can't suggest an alternate #12. I will say that having to intergrate Perry's first nine into the routing for the full 18 surely limited what land Press was able to utilize.
I do like #13 and 14 very much (with 14 a much, much superior short par 4 than #12), but am not a fan at all of #15. To play armchair architect, who knows if a long par 3 going NE (from a dune north and west of the current #12 tee) to the lower current green site of #12 not worked out better. Move the tips back on #15 some 50-70 yards (may have to cut a cottonwood or two, but these are trash trees anyways) and the green a similar amount back and right, smaller in size and Perryesque. Now you have a more interesting, drivable short 4, a long 5 (#11), and a long 3 (#12) that is totally unlike the other one-shot holes.
On the other hand, PD is just fine the way it is. Do notice, I didn't recommend Fazio and Wadsworth as the team to do the work.
BTW, during my first visit I played as a twosome with the GM who is a PGA member and a fine golfer. We walked the course (pulling carts as I recall), and he showed me some of the changes made to the course over the years.
Later, I was also fortunate to play with one of the club's leading senior members (who played amateur golf nationally and been a longtime member). This gentleman was involved in some capacity with the proposed changes (some apparently prompted by the desire to become more attractive to the USGA), and was concerned that the back tee additions had already tampered negatively with the routing and flow of the course. He showed me some new tee sites and changes that were being discussed (ostensibly to bring the "Big Show" to Hutchinson), and a few of these appeared to be radical. I am sure he is pleased that the experimental faux dunes, more like small-scale, sparely-grassed mounds, between #12 and 13 were scraped off.