I work at CAA...like AAA in the US. So far I haven't seen any deals other than what has been mentioned here. Some locations will have a Disney Day where they will offer something extra with a booking. Ours is January 19....it is my first year there and since my manager considers me her "wdw expert" she has been including me in the decision making. We are in talks with our rep to see what we can offer.
Keep in mind your AAA
travel agent can book any codes for you as well. So if you book at the package rate and a better rate with code comes out...just call and have them change the booking. As well through the agents booking website they can book AP rates and order your room tickets. For most of these things, yes you can do it yourself. There are people though that prefer to do it with an agent still.
The AAA packages do have some extra features as well...I am not at the office so I don't have the full list.