You can tell when you read their posts that they're just being totally unrealistic. I don't let an occasional bump in the road ruin any of my vacations, to Disney or anywhere else that I go, and neither should you. 
My advice to you is ignore the description of the parks you gave. You dealing people that went to WDW first back in the 1970's, 1980's or 1990's. Those people have different outlook than a new person would and you should expect that as much.
Mmmm - you may want to reconsider your 2 days at AK - it really IS (at best) a one day park.
I have to agree with the Captain(arrrrr), I would switch 2 days at AK to 2 days at EPCOT. However, you don't have to decide now. Go to AK once and then decide if you want to go again or somewhere else. I also agree with most here with the park hopper. BUT, and someone correct me if I am wrong, I think you can add that during your stay. That way you do AK in the morning and EPCOT at night.
I don't know what animals your 9 year old likes but my husband, who also loves animals, loves the Gibbons that are located in Asia. He has been trying to get my son and I to get there first thing in the morning when they are doing their "calls" at sunrise. He says it is fascinating to watch and listen!!! He also said it is quite loud! I'm sure if you had to live in the country where these are native, it would be rather annoying when you're trying to sleep in! This is something you should consider. If you're interested, get there when it opens and head straight back toward Kali River Rapids which is in the Asian section of the Park. There are two types of Gibbons, so the best place to stand is in between them which is near the Fastpass building for Kali River Rapids. The building is the one shown below.
Did you book your FPs for early in the day when you plan on getting there or did you spread them out? The reason I ask is that you can continue to get more FPs during your visit to that Park as long as you used your first three. In other words, if you made two in the morning for rides and planned the third for the fireworks, you wouldn't be able to get another until after the fireworks. IMO, I would pile them on back to back as early as you plan on arriving at the Park and then add more as the day goes on. Just a thought.
