I'm not on the "it's just a zoo" bandwagon, so please refrain from putting words in my mouth. I also realize that it is the youngest park, but the fact remains that it is still sorely incomplete. And it does not have the value that the other parks have.
This is a rough cut, but a quick search gives MK's open attractions within the first 8 years as follows:
1971
* Disney’s Magic Kingdom first opens its doors on October 1 for approximately 10,000 visitors with the following attractions: Cinderella’s Golden Carousel, Country Bear Jamboree, Diamond Horseshoe Revue, Dumbo the Flying Elephant, Frontier Shooting Gallery, Hall of Presidents, Haunted Mansion, It’s a Small World, Jungle Cruise, Mad Tea Party, Mickey Mouse Revue, Mike Fink Keel Boats, Mr. Toad’s Wild Ride, Skyway, Snow White’s Adventures, Swiss Family Treehouse, Tiki Room, Tomorrowland Indy Speedway and Walt Disney World Railroad.
* The Liberty Square Riverboat opens along the Rivers of America on October 2, the day after the grand opening of Disney’s Magic Kingdom.
* Several new attractions open at Disney’s Magic Kingdom before the end of the year such as Flight to the Moon and Circle-Vision 360.
1972
* If You Had Wings opens in Tomorrowland at Disney’s Magic Kingdom and features state-of-the-art OmniMover vehicles.
* The Walt Disney Story makes its debut in Town Square at Disney’s Magic Kingdom.
1973
* Tom Sawyer Island makes its debut in Adventureland at Disney’s Magic Kingdom.
* Pirates of the Caribbean opens in Adventureland’s Caribbean Plaza at Disney’s Magic Kingdom.
* The Swan Boat ride opens in the Plaza at Disney’s Magic Kingdom.
1974
* Star Jets (later known as Astro Orbiter) opens in Tomorrowland at Disney’s Magic Kingdom.
1975
* The Carousel of Progress opens in Tomorrowland at Disney’s Magic Kingdom with the new theme song, “The Best Time of Your Life.”
* Astronauts Scott Carpenter, Gordon Cooper and Jim Irwin take the first ride during the grand opening of RCA’s Space Mountain.
* Flight to the Moon evolves into Mission to Mars in Tomorrowland.
* The WEDway People Mover makes its debut in Tomorrowland.
1977
* The Main Street Electrical Light Parade makes its debut at Disney’s Magic Kingdom.
Big Thunder also opened in 1980. So within MK's first years, quite a bit of the park's foundation was in place. And while others may disagree, I have fond memories of Epcot in it's early years. The original
Imagination,
Horizons, etc.
I will grant you that when MGM opened, it was quite barren. I was there about six months after it's formal opening and there was very little to be had. It was a rush opening.
Again I say that AK is not a bad park and it has a lot of potential. At the moment though
in my personal opinion, there's just not enough to define and seperate it as a full-day, standalone experience. Your mileage may varry.
-m