Just glanced at it. It fails my litmus test, at about 2hr13m. Oh, well.
I edited my post again, because I found the litmus test scene in M4’s edit. It looked… okay to me. The music builds up a bunch before they run the rapids, and only after they run the rapids does the music fade, just as they get to the listless floating part.
I am downloading Maple Films’ version to compare.