Well, fortunately for the millions of Frozen fans out there, it's not your call.
That said, I had no idea the impact that Norway had on folks to be so passionate about it's extremely loose connections to the Maelstrom ride. Nor was I ever aware that the ride actually took place in Norway - can we prove that? The Scandinavian folklore that beget trolls and Norse Gods was actually not exclusive to Norway, but also part of the history of Sweeden, Denmark, Iceland, etc. And they hardly have the patent on oil rigs.
I'm sad to see it go, but that's why I don't see a negative impact on World Showcase - they are trading one loosely-based fantasy ride for another, but the rest of the place is going to stay stagnant as it has since the 80's, no worries to be had.