Early morning safari, picture taking with some of the animals, meet and greet and lunch. So, yes, there are a couple more things to do. But nowhere near a full day of fun in that park. Think if EE wasn't there.. Would you even consider it a 'must see' park? It's a rough call.
The park has a GREAT atmosphere, but severly under utilitzed space.
I'm coming from the bias that Animal Kingdom is my favorite park. Having said that, I understand why people don't like it but I really think the perspective that many have is short sighted. There are 3 classifications of activites in the Animal Kingdom: Rides, Shows, and Animal Walk Throughs.
Rides: Kilimanjaro Safaris and Expedition Everest are two of the best rides on Disney property. Dinosaur and Kali are underwhelming largely because it seemed that both could have been much more. Primeval Whirl and Triceratops Spin are placeholders. The park needs more quality rides, it's the obvious weakness to the park. So many people visit Disney World and only want to experience rides. As such, a park like the Animal Kingdom is largely forgettable.
Shows: Festival of the Lion King is a top 10 attraction in WDW. It's far and away the best show on property that doesn't involve Pyro, and that's really only to eliminate Illuminations from the discussion. Finding Nemo the Musical is solid and Flights of Wonder is very underrated. Having said that, the number of people that skip these offerings (especially Festival of the Lion King) is mind blowing. I don't see Nemo or Flights of Wonder every visit to that park, but I always see Festival of the Lion King.
Animal Exhibits: There's quite a bit to see here if you like animals, but if you're indifferent (like many guests), it comes back to "where are the rides?" I think we're nearing the point where Maharajah Jungle Trek needs to be redone to allow access to the Northern plot, and if the temporary coverings don't get removed from the Discovery Island/Tree of Life trails the park looks that much worse.
The problem here is that not everyone wants to experience Rides, Shows and Animal Exhibits. There isn't enough in each category to satiate the needs of people that only want 1 of the 3 things. Comparitively, Epcot's 3 categories are Attractions, Shopping, and Dining. If you only care about the Attractions you still have 11 rides to choose from.
Your opinion - but the park has a lot more than that, and actually did attract guests for EIGHT YEARS before EE was added to the park. EE has become a 'must do' for the park, no doubt. But EE is not for everyone, EE is not the only reason people come to the park, and people don't ride EE for 5 hours a day and then leave the park.
Stop skewing your view as a 'rides rides rides' person and realize there is much more to the park than maybe what you as an individual may value.
Yes, 1 million isn't anywhere close to 75% jump as quoted by rle4lunch. from 2005 to 2007 (your period) attendance jumped ~15%
DAK could survive without EE. Would it hurt? Certainly.. but it's not going to roll over and die.
The park opened in 1998 with the following "rides": Countdown to Extinction, Kilimanjaro Safaris, Discovery River Boats, and the Wildlife Express Train. Kali River Rapids was added in 1999, and Dinorama was added a few years later. The park was underbuilt from the start, and every addition was seemingly rushed to add capacity save Expedition Everest. Despite all that, I view the Animal Kingdom as the best "themed" park I have ever visited. This is part of the problem with adding to it - to cohesively add new things to the park is difficult without disrupting the existing theme.
I posed the question about how would they go about replacing "It's Tough to be a Bug"? Is there really anything that could go into that area? My only suggestion was indoor animal exhibits.