Super late reply, but I can finally address this. Haha. As beautiful as the Forbidden Journey queue is, there are obviously some inconsistencies in terms of staying true to the look of things from the films. In that photo, you can see that the Herbology greenhouses are located on the right, whereas in Japan/Florida, they're located on the left, out of sight, since it's part of the queue. Once you take out the chunk of greenhouses on the right, you're left with an awkward gap. If you filled that gap in, it wouldn't look like it does in the films. I dunno, could've been Rowling's doing.