You guys have short memories. 2016 didn't have black walls outside of The Exorcist, where that was the explicit design intent (and it worked beautifully). I don't recall mazes prior to that suffering from the epidemic, either.
It's a consequence of the maze count increasing. The maze count is about to go up again... by two. It's replacing an attraction that's been the focus of aggressively recycling because there isn't funds to make it anything more.
I'm not saying you necessarily need to lower expectations, because one would hope they got a decent budget pump-up... but still, do the math.