Walt's vision of EPCOT is nothing like what it turned out to be, but would that have been better or worse for Disney as a whole. Disney, as a company, was in serious shape in the early 80s would Walt have been able to save the company then? Would those who constantly grouse on what each park needs, (a dark ride, a thrill ride, a new show, etc.), have been happy with an EPCOT that would not have been a theme park?
It should also be noted that anyone who does not think that Walt was in it for the money has never read anything about him. His idea was to give the customer a better product and they would buy his instead of anyone else's.