See here's the thing with this (and I've seen this spoken about with Memberships before, so excuse that the following rant doesn't quite line up with your comment): I have a membership with Jetts gym. I got it about 10 years ago and pay around half of what it costs to go now. I wouldn't for a second describe myself as loyal, I keep it because it's cheap and sometimes it rains for weeks at time and I need to stay active. If they said 'We're changing it so that you now pay slightly less than someone who signs up today, but there are cheaper plans than that you can get", I wouldn't jump onto workout forums and complain, I've been on a good deal for years, and I know full well I only keep it to take advantage of the fact I got a deal when I signed up. If i couldn't be bothered to see if there was a cheaper way of doing things, that also wouldn't make me loyal. Of course everyone on here with VRTP is in the same boat. I also have a similar situation with Telstra where I'm still on some plan that is much cheaper than what you can get now. When they change it, that'll mean I'll have a look and see if there are plans that are better. I'll lament that it I'm sad I have to pay more now, but know I got a good deal for an unreasonably long time. Not act like they need to offer me a better deal than what they're giving me because I've been signed on with them for so long.
Guess what? Passes aren't cheap anymore. They've nearly tripled in price since memberships started. The parks are still packed, the peak periods are longer than they've been, and you've been getting a deal the whole time. I hope all people on memberships can adjust to paying close to what everyone else pays. If not, well fair enough. I'm sure they've run the numbers and know that paying the normal price won't be for everyone, and many will drop out, and have decided that is OK, it's worth taking an attendance hit of the people who pay the least.
Ultimately, I think the reason I don't care is this: Your complaint shouldn't be that they're doubling the price now and bringing it in line with their other prices, your complaint should be that they haven't raised them in 10 years, which has made it difficult for you to manage your expectations.
Just quoted this because I think the outrage committee probably needs to reflect on what things cost.