I have to wonder whether or not most guests recognize reused props or rooms. It's one for fans to notice things, but everyday guests? Then you start having a problem.
Even I have to admit that the event is getting all-too familiar. I get that having a door with a strobe light is a great effect, but it gets extremely tiresome after all the mazes use this technique. Who knows, maybe we're in the minority, but you can actually start predicting where scares are going to occur.