Flight of Passage is most certainly Soarin’ 3.0. What that means depends on if you think Soarin is an amazing ride or not. In any other parks, Soarin would not be nearly as popular. Even in CA as opposed to FL it’s not nearly as popular. Both rides’ popularity are heavily dependent on the WDW crowd.
I have always argued that if Soarin was instead Soarin over Hogwarts, it would have a very short line, and be looked down upon as phoning it in like Kong. I’ll absolutely never understand the folks who wait an hour or two to experience Soarin or FoP for anything but the first time. Soarin’ isn’t worth a 15 minute wait with the mind numbering preshow.