Awesome post!
I think the sponsors of the Norwegian pavilion insited they be represented for their petrodolla...erm krones. And so we were stuck with that weird oil rig that I think nobody appreciates but they themselves. Not the designers, not the riders. Not that an oil rig is off-limits itself - Exxon gave us one too in the Energy Exchange. But that one felt fitting, in a hands-on exhibit space. But on a short ride showcasing Norway? Most Norwegians do, in fact, go about their daily lives a 1000 miles removed from any North Sea oil platforms. (Even if their product pays for their excessive standard of living, grrr)
At Maelstrom the rig feels sudden, indeed, as you say, an abrupt change in tone. You simply can't do too much in such a short ride. I wish the designers would've opted for a more cohesive story, more focused. Like your music video analogy. That works so much better if you don't have ten to fifteen minutes at your disposal. Wish they would've just gone with the trolls and mythology and left modern Norway for the post-ride movie or an exhibit.