I don't think you're trying to make everyone happy because you've shut down most of the suggestions people have given you for attractions.
On the same hand, I also don't think pleasing everyone is an attainable goal, more important than anyone else...are you designing something that you would want to see? That you would want to experience?
If you don't take care of that factor first, and narrow down what you would want to see, then it becomes a circuitous exercise because there's no set objectives.
The only reason why I elaborated on a different location was an attempt to help give you more room for your expansion and to make it more realistic (in my view at least).
I shut down their ideas, because they just don't seem really doable in reality. In the case of, say, the Radiator Springs Racers, if they simply use only the technology from Test Track there, why aren't they using the technology elsewhere in the Florida resort?
There are many things I myself would like to see, but it's no fun doing them when the space for them is not (or will not be) available. On many of these threads, I see most people decide on what they want to see and then just go with it, whether it's realistic or not. It's really no fun coming up with ideas that I want to see, only to be stopped by logistics. Unlike someone like, say,
@MANEATINGWREATH, I prefer not to be too fictitious in what I would like to see happen. I prefer to work in parks that actually exist (or in the case of that park idea in Brazil, come up with a real location for it). As far as I'm concerned, it's just as important to decide on a location for an idea as it is to do the idea itself. I once did a whole thread devoted to this very subject:
https://forums.wdwmagic.com/threads/blue-sky-vs-all-else-but-mostly-constraints.897813/. In this, I argued that constraints are just as important (if not more so) as the blue sky process.
On a slightly unrelated matter, in that thread, I believed you mentioned that all four parks have several expansion pads, but besides the one you proposed beyond the train tracks, where else can they happen in the Magic Kingdom?
Anyway, this different location you speak off would only work if the river was not rerouted by scrapped entirely. This would open up a lot of space for something else since the Rivers of America takes up a ton of space anyway, but what about, say, that little turnabout at the base of Splash Mountain's main drop, which always juts out into the river in all parks?