Mike,
The courses are doing very well and so is the club!!!!!!
The Upper Course (where the Opens used to be played) underwent some small changes in 2000, all done by Kyle Phillips. Tees, greens and bunkers were revamped with movement added to greens, but nothing drastic. In addition, two holes were changed (new green on the 12th - a very downhill short par 4) and 16 (now a short par 4 that has gone back to the original Colt routing - the one you played was built in the 60s).
The Lower Course was completely rebuilt in 1998 by KP (while he was still working for RTJJr) as the club lost some property to a nearby highway. He did a terrific job by remodelling some of the old Colt-Simpson holes (12 of them), while building six completely new holes. Competitions are now played in this course.
The club doesn't host any pro events anymore, as it feels it is not worth it if the top players are not going to come. Instead, it has focused on hosting top amateur events, which are less demanding on club and members, while also providing the opportunity to maintain the history of competitions that the club has held for 100 years.
I'll see if I can get some pictures posted, following Cristian Willaert's series on Colt's continental work.
Regards,
Alfonso