I can see how you could be concerned about size, but with smart architecture, Epcot New York can definitely be built to be the same acreage as a normal size theme park or the original Epcot theme park. It depends on the master planner and how intelligent that chosen person is. There are extraordinary opportunities at this chosen site of Flushing Meadows park.
LaGuardia Airport is only 1.5 miles away and is currently being completely rebuilt and updated. $450 million dollars of public money has already been set aside for a public mass transportation rail project to connect the airport to the subway station that is directly in the middle of the proposed Epcot New York site, Citi Field Stadium, and the USTA National Tennis Center. There have been many proposals to build enormous convention centers and entertainment complexes like Disney Springs in this adjacent area as well. That would also be very awesome and would continue to add economic success to this project. There is additional space for those projects as well, if they build above the subway rail yard just like the master planner of the enormous Hudson Yards development decided to do. That happens to be the largest private real estate development in the history of the United States.
What really needs to be built, for the huge airport redevelopment project also, is a connection to the main branch of the Long Island Rail Road, which also has a station less than a half mile from the southern end of Flushing Meadows Park. The by far most optimal mass transportation design would be building a monorail to connect LaGuardia Airport; then the area near Citi Field, the National Tennis Center, and the subway station; and of course Epcot New York; all to the Jamaica Long Island Rail Road station. This station has a connecting "Air Train" also to JFK Airport. Over 20 years ago they proposed building an "Air Train" in this exact route. Although it was rejected because the Air Train makes too much noise. A monorail would definitely not cause that problem.
There would not be automobile traffic problems like others have claimed before; because the Long Island Expressway, the main superhighway that travels from Manhattan to the end of Long Island, travels right through the middle of Flushing Meadows Park. As long as the master planner directs traffic properly using a double lane exit and builds the proper access roads to the parking structures there will be no backed up traffic. Epcot New York's actual park architecture can be built beneath the highways to connect each area of the park, and visual and noise barriers can built so visitors won't even realize that there is a highway near where they are. It's all about architecture, proper master planning, and the willingness to build something beautifully and correctly. I believe its worth it. Only for the important reason that this park has a mission, and that mission is to educate people about the potential of our world when we focus and place value on the right things that will progress our world forward.