First the ride system of the two are nothing like each other. FOP has more in common with the mechanics of Back to the Future than Soarin. Flight of Passage is the first large format projection simulator that doesn't use the traditional iMax parabolic screen but a custom screen and projection tech designed to have perfect viewing angles from all seats. (except perhaps Kong 360 but that's really just a bunch of projectors in a straight line and definitely not designed for good viewing angles from any seat). It's the first ride system ever to integrate the queue/a room in the attraction as part of the ride system itself. It's the first attraction that can dynamically change the script and pre-show content to fill time as needed. It's the first attraction to use a ride vehicle that uses haptics to increase immersion. It's the first simulator attraction ever that has been able to convincingly create the illusion that you're not in a simulator.it’s really not. as others have said before, new. It just refined existing techniques and systems. It’s basically a Soarin’ 2.0. It is fun, it it’s not a game-changer. It has the same ride system as Soarin’, it’s a little more immersive but not new or original. Forbidden Journey, Matterhorn, and Hunny Hunt are game changers because they did something remarkable for ride systems and the industry as a whole.
I can also make the argument that the attractions you list weren't game changers. Hunny Hunt is an evolution of UOE/GMR/Tower. Matterhorn an evolution of the classic scenic railway attraction at places like Tivoli, and FJ just a rearrangement of the mechanics used in Spiderman with some Journey into Imagination thrown in. Now I would agree that all three attractions you listed are game changers, but there's more than enough original and groundbreaking/next level feats in FOP to consider it a game changer.