I'm the one who posted that that is how we did our packaging for Universal and Disney this year. We've done the Disney vacation packages and also the AAA ones. Both of them come with some perks (like free tickets for miniature golf, souvenir mug, picture op, etc.). But since we knew we weren't interested in the perks and weren't driving so didn't need parking discounts, we chose to save the hundreds by booking everything separately.
I WILL tell you that you CANNOT buy dining plans at either park unless you book the whole thing through them, including the park tickets. But since Universal's dining plan was something like $48/per person per day, I know for a fact that one of us would never spend that much on food in one day. So it wasn't any loss to us not to get dining packages.