Say what you will about Frozen Ever Maelstrom.. but there was never a line for maelstrom.. there was barely a queue. Now it's SRO all day long. SO clearly they hit it with a significant segment of the population. And I don't miss Abba working oil rigs, to be completely honest.
Seas was just about dead till they did the Nemo thing.. and it's worth a ride once per visit.
The attendance at the property has exponentially increased since Epcot opened. They need attractions that hold more people, and keep more people busy. We want these changes to the parks that cost mucho dinero, but we don't seem to want the increased traffic to support them. You can't have it both ways. As long as the queue is interesting, I might actually stand in it for a while.
We want good theming, increased population would just be a bonus.