I think we did a great job of addressing the drainage issues. On the greens, they were of course built correctly (something not done in the beginning) and we also installed a sub-air system in every green. The greens, particularly being this young, drain almost "too well"!
We also added extensive drainage on many fairways--for example on hole 18 we added 3 24" drainpipes across the entire fairway (from creek to creek) at about 35 yard intervals. What used to be the wettest fairway is now one of the driest.
We moved about 6 green complexes completely #1, #2, #3, #4, #5, #11, #13 and we were able to make significant drainage improvemnets there as well. We also added extensive drainage throughout the rest of the course.
We re-did 90% of our cart paths and we have been able in the renovation to detour a lot of water from ever reaching the course in the first place.
Bottom line is that the course drains much, much better. We also have instituted a very aggressive topdressing and aeration program for the fairways and approaches as well. Too early to tell, but I think that will make a big difference as well.
If you played the old course, you have to check out the new--nothing like what it used to be.