Ian,
Add the River course at Blackwolf Run to that list (one par three on the front, three on the back.)
Summit is a good example, because I never notice the four par threes on the back, and yet, the course flows along well.
It is impossible for me to imagine that a designer envisions building 4 3's, 4 5's, and 10 4's, before he sets out to do the routing. It would take an open mind to route a course with back-to-back par threes, or three on nine holes. So in my opinion, design has become too conventional, if the 4-4-10 arrangement is always sought, which it is more often than not.
When you route Ian, do you aim for par 72? Do your clients ask for it?