That would be a good start, but it needs much more than that. How about 8 - 10 "must do" great experiences? The park does not have that now, or with the upcoming changes.
What does that even mean, and what park even has that (besides MK)? It's also really subjective, as my "must-dos" may be different than yours. For example, in Epcot, I consider Spaceship Earth, LwtL, Soarin', and Test Track to all be "must-do" experiences every time I go (Frozen, despite it's misplacement in WS almost makes the list for me for being one of the better FL style dark rides on property, but I could skip it if needed). Let's look at the other parks (and again, this is my own
subjective list of what's must-do for me.)
MK: Pirates, Thunder, Splash, Haunted Mansion, it's a small world, Seven Dwarfs, Space Mountain, PeopleMover.
DHS: Star Tours, Mania, RnRC, Tower
AK: FoP, Safari, Dinosaur, Everest
So outside of MK, the other parks have a similar (in my own view) # of must-dos. This doesn't mean the parks are all equally good (or not good as the case may be). Take Animal Kingdom. Really only 4 must-dos, but to me it's an amazing, great park (much like Epcot was great in its heyday). It's all the experiences
around the must-do experiences, the secondary experiences, that take it from good to great. Walking around Harambe, experiencing the theming and the entertainment. The various shows, animal exploration trails, etc. The theming. This is where Epcot is currently lacking. Could it use a couple more "must dos"? Sure. But it's the surrounding experiences that are gone. Nemo is a pretty poor story, JIIwF is a train wreck, and WoL and Innoventions are wastes of space. World Showcase is still awesome, but that's only 1/2 of the park. Fix the secondary experiences and make them good, Give people enough interesting things to do to fill a day, and anchor it with must-do experiences. I think Epcot needs to fix the former before addressing the latter.