Definitely need an AP Preview.
Other than Previews and the magnets,Disney has just about dropped all fun little extras for Passholders.
I remember doing the below Passholder events over the years and they were so fun-made being a Passholder feel special.
Touring Cinderella Castle Suite.
Touring the American Idol Experience before it opened and seeing backstage,etc.
Going to an after hours screening of Saving Mr.Banks in Hollywood Studios at Premiere Theater with Popcorn and Soft Drinks provided and then while leaving the Park finding a Red Carpet in front of The Great Movie Ride with Mary,Bert and the Penguins available to meet.
And one of my favorite things hanging on the wall is the "Dumbos Light Flight" Lithograph by Don Williams that Passholders were given exclusively years ago.
Even The Mickey Monitor has not been brought back to date.