I don't think that the viewing area is meant to have the "best" view possible of the show. As you noted, it is off to the side, though still with a very good view. I think the main draw of the FP+ is that you don't have to wait for hours to get a great viewing spot for everyone in your family. I haven't watched from Crystal Palace, but whenever I've been on Main Street there is always the risk that someone taller than you will block your view or the view of your children. The FP+ area is seated only, so everyone can see the show, regardless of how tall you are. Also you don't have to get there hours ahead of time to get a good spot, so there is also that. So, yes, you can get a a view that is just as good or better elsewhere, but having a FP+ means you know you'll get a good spot.