I just now finished a conversation with my wife about that. Am I crazy, or did the homescreen also used to autorotate?
I can get most of my apps to autorotate, but my homescreens won't - evidently since (on the AT&T Note 3, at least) last night's update. I was fooling around most of the day trying different wallpapers for St. Patrick's Day, so I thought maybe I messed something up, but her phone (same model, same update, no playing with anything) has the same "feature" now. Mu Messaging app rotates, it's just the homescreens (and, yes, I have it checked).
What are they planning on breaking next?