AAA honestly doesn't give you very deep discounts on Disney passes or resort discounts (with the exception of the swan/dolphin rates). I believe the seasonal passholder discount might be $10-15 off of normal price, day tickets maybe $5 off, nothing that significant.
Many people still swear by AAA because its other non Disney benefits seem to be totally worth the membership but I would never get it just for Disney discounts because in my opinion they aren't that great. Fl residents alone get similar discounts without AAA.
Your best bet to saving money on a pass is to go to one of the parks and buy a day ticket. If you come back within two weeks and upgrade it to a pass they will deduct what you paid for the day ticket from your upgrade.