I don't know if this would be considered a benefit, but we renewed our AP within 30 days of expiring and Disney offers a discounted price when you renew. Additionally, we upgraded to a premium annual pass, since we plan on going to the water parks at least 2-3 times on our next trip. Even though our original AP was the standard AP, we paid the renewal price for the premium AP. This won't work for us the next time our renewal time comes along, but it was nice to save a little $$ this time.
One benefit of the premium AP we are excited about is the 20% merchandise discount. It's rare to get a 20 % discount, although I do remember a trip a few years ago when the Disney Visa had a 20% discount at the park stores.