Possibly.
1) most of the mazes being repeat themes
1a) one of them being Walking Dead, which is oddly still heavily advertised, which has been around for like 6 years now
2) low popularity mazes nobody cares about (Ash/Blumhouse)
3) concepts that are a bit confusing to the general public (Titans/Blumhouse)
4) even the classic maze people always wanted to see gets low lines, so apparently it's not as popular as we thought.
5) the popular themes we've seen before, and seen them done better (Insidious/Saw)
6) word of mouth is that this year is "okay" and it's probably spreading fast, before October has even come.
7) general bad word of mouth over the years that it's too crowded and that the scares are repetitive, not enough scarezones, and too expensive for what's offered according to people who only see one maze, 3 rides, and the Terror Tram.
I suspect it'll still have it's sold out nights during peak time, but I wouldn't be surprised if we see them pulling last ditch efforts to get people into the parks, like opening Harry Potter, adding another show, or just dropping the prices dramatically.