One thing I think some people need to stop doing is acting as if Maelstrom was a great ride that's a tragedy to have removed. Let's be real here, it has been a mediocre ride since day one. If you go around complaining about what a "great" ride Maelstrom suddenly is, then all that conveys to Disney is that you hate any change at all. Focus on the real issues:
1. A ride in Epcot, a park already lacking in rides, should not be replaced when there is plenty of expansion space. There's an expansion plot right next to the Maelstrom building, in fact.
2. A ride in Epcot based on a real country and real culture and history should not be replaced by something completely fictional and fantasy.
3. Nobody would take issue with a Frozen attraction in the MK where it belongs, or maybe even DHS which also desperately needs new and more attractions.
4. Seemingly zero attempt is being made here to mask the greed, laziness, and cheapness of this decision which, while not the first time, completely disrespects the history, vision and purpose of Epcot. "You want a Frozen ride? Fine, we'll put one in in the cheapest, laziest, least appropriate possible way."
Or, alternatively, if you are okay with Frozen in Norway:
1. They have made it clear already that there will be no attempt to tie this into Norwegian culture and it will just be another Fantasyland-style recap of the film.
2. The Maelstrom ride and queue have terrible capacity. The Maelstrom ride itself is too short to begin with and this will leave people who were looking forward to a Frozen attraction underwhelmed. The Norway pavilion is in no way equipped to deal with this increased demand unless this is NOT an overlay and the building is completely gutted and rebuilt.
And if its completely gutted and rebuilt, why not just use open land and build a new attraction instead?