Understand that I am not happy about the loss of EPCOT Ctr., but, it died a long time ago. It was great for some, but, not for most. We as a small group cannot support the place ourselves and we at some point in time have to realize that the time of EPCOT has passed. Great while it lasted, but, didn't have a sustainability simply because of it's mission. That was to stay ahead of progress or at least with it. The speed that technology developed after EPCOT was built made it so that the best they could ever do is be the Experimental Prototype Community Of Today, but, mostly yesterday. It never was what the title said anyway.
I think that there is a still great experience in Epcot even if it isn't the original intent. But, without something to draw people into the place, it would be just another empty place where all good ideas go to die. It needed Frozen. The concept of Norway, which for the most part still exists, is not harmed by Frozen, but, it did indeed breath new life into a pavilion that had already passed away. We can argue forever that the location of the Frozen story was not Norway, but, if you can think of a more suitable thing that maintains even a degree of theme, I'd entertain it. However, it was still be at the overall cost and loss of Epcot. Pleasant memories will not maintain that park. We all know that Disney is money motivated, they won't continue to support a park that is slowly declining in popularity. Whether we like it or not, something had to be done to stop the bleeding. Saving the overall body is far more important then worrying about whether or not the band-aid matches our complexion.
Yes, they could have built a new ride for it someplace else, but, the troubled standing of Norway would still be a problem and we all know what Disney had done with problems, especially ones that cost money. They became special places for festival locations.