So, I didn't get into it in the story, as it is just speculation, but, I have a thought...
Perhaps all of the outdoor attractions are meant to be Dragon training classes. Flying lessons on the Sky Fly and coaster. Battle lessons on the Splash Battle, with targets set up around the course. And various tasks throughout the play areas.
All leading to the indoor ride where you actually get to fly a dragon "for real".
And down at the very bottom of the land is the show and meet and greets, where you can get to meet your teachers and learn about their story. So you get some narrative, passive fun, in a show too.
It kind of reminds me of the Legoland City themed lands, where you go to "Flying School" (suspended coaster,) Driving School (Autopia type attraction,) and Boating School, etc.
I think this land will be very much our journey to learn "How to Train Your Dragon" and that's neat.