Thank you! I will consider that about the Little Mermaid show. I wouldn't have known about that. These are all the little things that make it hard to choose FP+ for a place I've never been. I'm sure we'll be trying to make changes to FP+ on the day of and we'll see how it goes. Muppet Vision I don't need to see since I've seen that many times at DLR. Same goes for Capt EO. Also good to hear the customized touring plans worked well. If nothing else, I'm having fun playing around with it. And again, since I've never been, it is hard to know how much to put in for one day. I really want to do it all!
In general, if you are looking at average crowds, arrive at park opening and stay the day, and want to do 75% to 100% of the attractions at an average pace, not rushing too much, but not getting too distracted either, you need:
MK- 2 days
Epcot- 2 days
AK - 1 day
HS - 1.5 days
? - 1 day to repeat favorites or hit the 25% you still missed
Can you do these parks in less or more time? Of course.
For instance, lots of people say AK is a half day park. The problem with this statement is that they are only doing half of what AK offers, the half that they are interested in. What they should be saying is that they only think half of the attractions are worth doing, so after hitting the headliners and most popular attractions, it's only a half to 3/4 day park for them. You might find as my family does that you really like AK and want to do all the attractions, in that case you need at least a day, more if you plan on character meals, or to get all the wilderness explorers badges, or to spend a lot of time at the petting zoo, or a lot of time walking through the animal trails, or repeating rides. You can see, if you actually tried to fit in every single thing I just listed plus all the attractions, you couldn't do it in half a day, you probably couldn't do all that in a full day. Just the majority of the attractions and one or two of the above will take about a day, maybe a little more, so that's where I'm getting that number from.
From the above days, you can estimate how many days you will need at each park. So if only half of the attractions appeal to you at MK, plan a day. If you are going to do the parades, spend time window shopping, get lots of character signatures, and maybe do a few ADRs also at MK, add back in a half day to make up for that time, so 1.5 days. If you are going during a very busy time, figure you will need more time than the above to account for long lines, so back to 2 days or more. It's kind of a guessing game based on percentages, crowds, and extra activities, but it usually gives you a close enough guess to plan your trip from.
Also, if it helps any I've found that I can do about the same number of attractions in the first few hours the park is open, as I can do the rest of the day. Assuming, I arrived for RD. We always try to commando tour those first hours, no breaks to maximize the no line or very shorts lines. Then we go back in the afternoon and focus on ADRs, window shopping, parades, shows, playgrounds, and other high capacity attractions. Then if things calm down at night, we may ride a few of the more popular rides we missed or that we want to do again.
With a good touring plan and a little knowledge, you can hit 8-10 attractions in the first 2 hours, more if the parks open at 7:00. It really just depends on the crowds.
Hopefully, I haven't confused you too much. Hope some of this helps.