I"ll second the fact that if you're in a standby line, they'll just let hoards of Express through for 10 minutes at a time, while stand by won't move at all. The line for Scarecrow crawled because of this. Lines moved so slowly, we only did Weeknd, Legends, Scarecrow, and Hotel. Fortunately we have FFP, so we'll return, but we sort of expected to be able to do more (disclosure: we also stopped to eat, which sort of increased all the wait times).
That said, the few mazes we did say were pretty great in terms of scenic design. IMO, this is the closest Hollywood HHN has felt to Orlando. One detail I really appreciated that I haven't seen other mention is that they are finally starting to explore flooring options to fully immerse you. The carpeted hallway in Weeknd is a nice touch, and the bird poop floor in Scarecrow stands out. I always felt more floor environments would go a long way in theming. I do also agree that while I love Legends, that long black wall section 2/3 of the way through kills it. At least put in more lighting, fog, or sound design.