Matt, it's been awhile since anyone very familiar with the course discussed changes, but if you look back in the archives, probably about a year, you'll find some interesting exchanges. If I have time over the weekend, I'll try to dig up some for you.
My recollection is that most of the "improvements" involved finding room to lengthen holes. Tom Paul has always suggested the simplest and most logical change: printing 2 sets of scorecards with different pars.