I do like that WDW has 20% off merchandise. That's a good perk. There's 10% off most sit-down restaurants, but I agree it would be nice if they extended that to quick service as well (which they do sometimes for anniversaries, but not regularly).
And WDW APs get free stuff, like new magnets every month for some reason, and a tiny cutting board after visiting Epcot 4 times when it's the busiest!