Some interesting changes... (most of them, not very nice!)
We've stayed at the Hyatt Orange County for the past several years for our annual Disney trips for the little ones at 5000 pts/night. I always thought that was one of the better domestic values. That's been bumped up to Cat. 3 - 12,000 points/night.
I noticed Century Hyatt Tokyo went the other way... from Cat. 3 down to Cat. 1.