I just made our reservations for July. The new site would not work, despite it looking like I could make reservations for our entire trip, searches would find no results for anything beyond July 2nd (180 days from today).
Thankfully, my iPad is still loading the old website for some reason and I was able to make almost all of my reservations through the old system. The only exception was the Mama Melrose Fantasmic Dining package which I had to call and book with Disney this morning.
Got every reservation we wanted for 6 people with most being the exact time we wanted. We were off on a couple reservations by 10 minutes and only one by 25. Pleased that I was able to get things done the old way, hoping that the bugs in the new site are worked out for people soon.