This is very accurate and the reason we always go to Adventureland on our first morning. And the Magic Carpets, as early as possible.
We did AK the second morning because animals.
Our 4th day (after the rest on day 3) we opened HS with Tower of Terror for all 3 and RnRC for the 2 older ones. All 3 scoffed at Slinky as we headed to Toy Story Mania and Star Tours.
We then had a great lunch at 50s Prime Time where I think we were 9 at the table. (Star Wars Land had just opened and a couple adults were there.) Our waiter, Brother, was a hoot.
That evening was another Epcot evening. We have always toured a different evening park than the morning park. We usually use Disney transportation and usually discuss with kids what they liked enough to repeat.
I have found with kids that repeating parks makes the memories stick in their heads better. That’s one reason we do MK’s Adventureland and Frontierland one morning and visit another day for Fantasyland and Tomorrowland. Same with the other parks. And it’s why we have done Epcot on so many evenings - the girls remember Norway and Mexico better having experienced them on a different day.
Our goal with kids, grandkids and great grandkids has been good memories regardless of ride, food, watching street performers, whatever. One universal good memory for any age group is Cast Member interaction. The kids we’ve traveled with have usually brought favorite plush toys. Many times Mousekeeping with set up the toys in fun ways. Some of the kids we took also returned the favor - setting up their toys for the Cast Members before leaving for the park that morning.
Another important thing is to make sure everybody understands that things happen. Rides quit operating. Weather can be crappy. It’s all memories.
Kids of 7 that traveled with us always had their own way of carrying their own stuff - waist pack, pockets, small back pack. They had sunglasses, a snack, perhaps a disposable camera, water bottle. I like the small 8 or 10 oz ones. Just keep refilling.
A loose guideline is best. Especially if kids have not been to any theme park. They may not like dark rides. Or spinning. Or drops. Be ready to improvise.
One trip the 5 yo wanted to wear the flip flops she always wore at home. Walking from the bus and down mainstreet produced a blister. Quick trip thru the Emporium for socks and crocs and we’re back in business.