This thread has given me some thoughts. I'm not calling anyone out, just offering another option.....
What does it matter SO MUCH that a particular experience MUST be done? Are people seriously spending thousands of dollars and multiple days/weeks at a destination just for one approximately 5 minute experience? Has anyone thought of not staying up all hours waiting for the window and then seeing what there is when you wake up? Then if whatever is not available you either tell the person that wanted it, "I'm sorry but there were no FPs left for that, so your options are we can spend an entire park day waiting in line for that ONE thing OR we can spend the rest of the day checking out other fun things to do." Or if it is a child that didn't know to begin with, you don't tell them anything and then if they see at a park, you explain what happened.
If you want to tell me that this event is "ALL" your party wanted to do or "were really really looking forward to" and you can't do without, then perhaps you are creating people that are spoiled to having all of their expectations met. Call me crazy, but not everyone gets EXACTLY what they want EXACTLY when they want it and EXACTLY how they want it to happen.
There are how many people staying on disney property and in the parks on any one day? Hundreds? thousands? Millions? Do the math....people have different FP opening days than you. Not everyone with reservations/tickets is going to get to ride/meet "exhibit a" on May 1, 2015. They might not even get to do it during their time there from May 1-May 5. That's when you have an alternate plan.
I may be thinking crazy, but I am betting there are other things to do at Disney. I dare say there is even more than one park to find things to do! And resorts too!
I'm not sure why people get so crazy to do one particular thing, but they do. I think if you are paying all that money to go to Disney, you want to do what you want to do. If there is an A & E meet and greet, and you have a Frozen-crazy child, you want to go to the meet and greet. You don't want to save for vaca, to be told you can't do certain things because you didn't stay up until 1 am two months ago booking something that sold out in 10 minutes. It would be like planning a vaca to the beach only to be told you can't go in the water because the ocean is at capacity and you didn't book your swim time two months ago. Oh, but you can play in the sand and build a sand castle, or have a picnic on the beach, but no swimming. At least that's my take on it.
I think people who can go often can have an "Eh, we'll do it next time" attitude. But if you only go every few years, yes there is a need to do things that are popular, or new. Kind of like justifying going again, to do all the new stuff. So you want to do the new stuff.
I know the last time we were there, we wanted to do the new stuff we had not done before like soaring and 7DMT, and the new TT. It would have been really disappointing and I would have felt a little cheated if we didn't get to experience the new stuff. And isn't that why Disney creates all these cool new rides, to entice folks into coming back to experience something new? That's why we went back, and it would have stunk if we couldn't experience those things, because who knows when we will go back. We had to be flexible and would have preferred different time for certain things and it took some juggling but we got all the rides we wanted and just kind of went with it.