It might be that they don't need to offer an AP discount during the summer months to fill up the hotels. There was a Spring offer (expired on June 16, 2016), but I haven't seen any announcements for a summer or fall of 2016 offer.
That's too bad. One of the perks of having an AP has always been being able to save a little when staying at the hotels. But I can see where they don't need to offer any discounts. The parks are packed!