I feel like most local haunts are "scarier" because they don't have to deal with 30k attendees? (I don't even know if that's an accurate number) per night... A lot of local haunts I've done the line takes forever, but that's because they pulse you in really small groups...so you truly are wandering into these pitch black/quiet rooms with only your party... so there is a lot more tension... I think HHN does a great job with what their given. It's a conga line, but they do a great job at timing the scares so you are still likely to get a few good frights
The one thing that they do that I HATE (but I feel like they have gotten better at over the past years) is the occasional overzealous OPS team member rushing you through the maze and breaking the mood. In our first visit in 2013 this was terrible!