Now that I've seen Hween 2018, I still don't see why it wasn't done as a maze. All the plot points are hit in the trailer and even a good chunk of the kills. I thought there was going to be a crazy, unpredictable third act or something that's not even shown a tiny bit in the trailers, but if you've seen even pictures, you probably have an idea where it's going. [If anything, I wish they showed way less in the trailers.] Even with that said, I think it'd be hard to translate as a maze, not impossible by any means, but I think there'd be a lot of black walls to transition, and I can see the moaning already come 2019 or 2020 when they do this as a maze about how bare it is. I highly enjoy part 4 as a maze, so I don't mind.
I think by sheer numbers of people entering Stranger Things, it'll poll high -- it'll basically hit the right note with someone at some point, and that'll happen enough times with a high amount of people. I'm willing to bet it has at least a 90% conversion rate of everyone in the park, along with the Terror Tram. So the numbers are a bit skewed and judged unevenly, if say, 15k people go through ST a night, while only maybe 6k go through something like HOB.