We looked at this as a family yesterday, the increase in costs can be substantial when you are considering the multiple purchases for families. We are lucky though as we are Florida residents so the increase in costs is offset by renewal discounts as well as the pay monthly option. So while the increase is still substantial depending on what tier you have, its psychologically easier to swallow given it isn't huge over the usual monthly payment.
We have AP's for a few reasons:
1. We go multiple times per year for longer durations (2 weeks at a time usually)
2. We use the discount to help offset any costs of food, merchandise etc...
3. We can pay monthly and spread and costs
Not everyone can do it, and I certainly don't think I would stretch to $5k+ in a lump sum for out of state tickets up front. I think the 'pay monthly' option would be a great thing for everyone! But I understand the relative risks and loss in upfront real money. While the discounts can be good, we simply look at
ticket prices. If we are going for 4 weeks plus in a year then it makes sense to get the AP, gives us more flexibility and is actually cheaper than purchasing tickets for the days we want to go. If you are not going to be going enough to make the cost-value ration in favor of the AP, then I wouldn't consider an AP. The fringe benefits you get are nice, but in my opinion kind of like
@HopperFan suggest, they aren't enough to entice you to do it or keep it if the ticket costs are prohibitive. And as they suggest, other options become comparative.... so we are going to Europe this year instead!
We do a simple calculation, we look at how many days we are expecting to go in a given year, check out the cheapest regular discounted tickets and compare the cost. If the tickets are cheaper we don't renew, if the AP works out cheaper we renew. I know its different given the FL resident discount and monthly payment plans, so for that I feel lucky I guess, but for our family the increase while not awesome, won't be a barrier to our decision making as the daily rates will also increase so we will choose what is most cost effective.