I've been reading the book for over ten years and the main disagreements I have with it are over the "best and worst days to visit." I also completely disagree with the concept of avoiding the EMH park in the morning. It's one of the best perks of staying on site.
We've been to every park on every day of the week and it really all depends on the time of year. Although I would avoid the MK oin a Saturday if I could.
Deb, we're going to provide an update on those days sometime in the next week. That update will have more clarity around how we arrive at those recommendations, including things like guest surveys, wait time measurements, and third-party data. It may be helpful when answering this question.
The changes to EMH mean that the published days are incorrect. There are updates on www.touringplans.com but I have found that different sources give different advice.
I think the only bit of common advice is if you dont have access to EMH, dont visit a park on the day of it's EMH. Dont do MK on Saturday and avoid water parks at weekends.
I have found three sources which give the best days to visit each park. Each list is different! When I did an overlay, there were extremely few duplicates. However, I have always liked the UG and have found their advice to be sound.