who cares about soft opening? The exterior can be done & walls down without there being a soft opening. It being a maze instead of a ride means nothing. Just like a ride, it has to test... in this case, it would be the animatronics, puppets, live-actors and special effects. If those aren't perfected, that sort've kills the experience, especially for something like this.
But my point still stands, Universal has a trend for waiting until the last minute to try & get things finished in time. ....or they finish it/make changes after _____ opens.