I think that Drizella, err, Epcot really needed something to rehabilitate it out of ugly stepsister status (like AH and DHS).
The sensible solution that would respect the theme and history of the park would be to add more rides along the lines of Test Track and Mission Space. Thrilling and elaborate. It also would be quite easy to add really good rides to some of the World Showcase pavilions. A state-of-the-art log flume in Canada should be a slam dunk. A couple of dark rides in other countries' pavilions on the scale of Haunted Mansion or Pirates. A tour of Germany in a Mine Train style coaster.
It would be easy ... but it would cost a lot. So Disney decided to take the inexpensive, quickie shortcut of diverting a few million of the excess princess fans from Cinderella's park to Drizella's park.
I'm sure that if I had been presenting this argument to the Disney board, I would have been shown numbers which proved that it was financially stupid to preserve the integrity of Epcot as described. The problem of a completely broken Epcot with no purpose to its existence except for F&W and F&G, after the bump from Frozen subsides to next to nothing, is so far away that it doesn't even bear thinking about. That's like, three years away. And we can always slap in some other quickie thing based on whatever cartoon or TV show is big at the time.
If you really love Epcot you should get over it ... lay a bouquet of flowers on the tombstones at the front of the park and get on with your life. It's not coming back.