You and I agree on a great many things, but this isn't one of them. Walt didn't want to build MK in Florida. He didn't want to copy Disneyland on the east coast. He was told that he would have to build Disneyland East if he wanted to secure funding from the company for his E.P.C.O.T. Disneyland East was added to the property, in the far northwest corner in order to keep it out of the way of the main development - his city. Obviously those plans morphed at the end of Walt's life, and the park that became Magic Kingdom was part of the plans, but it was a begrudging addition for Walt Disney prior to his departure from this world.
Disney began surveying the land in November 1963. If memory serves, he was in the air when Kennedy was shot on the 22nd of November. That is neither here nor there... Disney died in 1966. Between 1963 and 1966 he presented his plan for E.P.C.O.T., and the board of directors forced him to add the park that would later be known as Magic Kingdom. By the time the 1968 models of Magic Kingdom were developed, Walt Disney was dead and the board was enacting changes to the Florida Project plans. The rest is relatively well known history - MK opened in 71; Disney's E.P.C.O.T city became a theme park called EPCOT Center which opened in 82; Horizons was torn down in 2000; the 2013 D23 convention didn't have any DHS Star Wars announcement, etc, etc, etc. You know, WDW basic history in a nutshell.
I don't pretend to know what Disney would have felt about things in his company today, but I like learning about the history of the man and his company.