Last night, Insidious, A Quiet Place, Universal Monsters, and Slaughter Sinema were all massive offenders. I noted they cleared the express line every single time from 6 PM to 11 PM at a nearly 5 to 1 ratio. I can't speak for the other houses since I hit them a lot later and everyone was probably done with express, by that point, but it underscores that an average person doesn't have a good shot at completing all the mazes, especially on a busy night.