I'm not holding onto the "Studio" aspect. I acknowledge that's pretty much dead.
But trying to explain why F&F feels right at home at USF but doesn't feel right at IOA, there's something real there. I'll disagree with anyone who wants to put BTTF or F&F or Ghostbusters at IOA, and all the same, LOTR or Wicked or Zelda (as full immersive worlds) at USF.
And I'd also disagree with comparing USF to any other Universal Studios (Hollywood, Japan, Beijing, Singapore, and soon UK). The major difference between our Studios in Orlando and all the others, is that they are 'single child' parks and we have two sisters (IOA and Epic). That means we (well, UOR leadership) get to choose where to place an IP, and base that decision on more than just "who needs a new ride." We get to choose where it makes the most thematic sense.