No, no, no, no, and no.
These parks work for a very specific reason and only for that reason.
Amusement parks with very few exceptions (Ceder Point, SFMM) are not world class resorts, and one hasn't been built in Orlando because Orlando is a resort town that people go out of their way from all over the world to see. You throw in a park that is a bunch of rollercoasters, even if they're great ones, and I guarantee you that park will have the lowest attendance rating in Orlando.
People travel to Orlando because every park in the area can be done as a family, most amusement parks don't allow that, or make it very obvious when they are separating kid rides and adult rides.
Let's look at it another way, BGT is an hour drive from the attractions area of Orlando. There are shuttles that will take you to that park from seaworld, hotels, and universal, but yet yearly attendance hovers around 4 million. Amusement parks work best when localized, SFMM and Ceder Point being exceptions because of how good the rides are, and even so it's a fairly short drive compared to Orlando, so local families will still take time to visit.
I like how you trash the idea, but just about every example you use you say that CP and SFMM are exceptions. People travel to those parks. Specifically CP. Its in the middle of nowhere yet still gets attendance similar to parks in major cities. BGT does not compare to CP on the ride front. They have some nice ones, but just about everything CP builds is a new experience for people. You put it in a major destination city and numbers would skyrocket. In 2011 CP had 3.1 million visitors and was closed for 6 months of the year! USF had 6 million and was open year round. Are you telling me that you drop CP in Orlando and give it 6 more months each year, it wouldn't at least get to 5-6 million attendance? Combine it with Universal pumping it and adding in the benefit of the multi-park tickets and it might outdraw USF.