1. Epcot Forever / HarmonioUS - the former is awful but short lived. The latter is long term, likely technologically impressive but also likely IP heavy.
2. Frozen Ever After - decent enough ride, wrong park
3. The Seas with Nemo and Friends - I have an issue with the ride, I don't have an issue with Turtle Talk. There's no effort to tie it into Epcot's themes
4. Gran Fiesta Tour - Same problems as Seas with Nemo and Friends
5. Imagination with Figment - Just an overall bad ride
6. UK Pavilion - I'm concerned Poppins won't fit
7. Cosmic Rewind's thematic fit? There are treatments that could work, but I could see them foregoing that. Not to mention the eyesore that is the building.
8. Beauty and the Beast sing a long in France
9. Play Pavilion - Doesn't seem appropriate, just an excuse to put all the characters in Epcot. I suppose that centralizing them all in one location is a good alternative to spreading characters throughout the park, but they're doing both.
10. The future of SSE - I fear they my put it in IP
I'd listen to arguments about Moana concerns as high as 9 on my list, but whatever.
I find this to be an interesting question. What are the problems with Epcot?
To me, there are not a lack of things to do. There are not a plethora of rides for kids but my children have gone annually or more since 2 years of age and at 10 and 15 they still love Epcot as much as any other theme park and will not allow us to skip it (I'll suggest it sometimes to see what they say) even in a 2-3d WDW trip.
I loved the authenticity of Maelstrom much more that the ride itself. It always beckoned with potential and then you ended up in the North Sea amongst the oil wells...so...disappointed once again. While the Frozen ride doesn't include Odin and it does include a line, I still enjoyed it more. We don't really ride it anymore since it's not worth the line for us, but still I would say it's an improved experience for those who care to experience it.
While the Rio del Tempo was definitely not perfect, I feel that it is worse with the birds. Would definitely prefer a redo.
Imagination is a mess. Besides Energy - which needed something - it's the worst situation in Epcot. Hopefully they hearken back to its distant past which was amazing.
Loved Horizons and WOM as well as the Living Seas of the past but never really clicked with Innoventions nor CommuniCore so I'm not really going to miss them. If they can create a lovely, beckoning environment around a WELL DONE renovation of SSE then I will be happy. Fix Imagination and put the Pixar movie into Mexico then I'll be pretty happy.
Then they can reimagineer The Living Seas. That would be icing on the cake.
Regarding themes, I suppose that Epcot's current direction is a celebration of the culture of mankind. From its evolution in SSE to its manifestations of exploration and civilizations. HS is the world of movies. AK is the world of humans/animals and mankind in nature. And MK is somewhat a hodgepodge but is mostly our world of fantasy. But Epcot seems to represent the way in which our human culture participates in its world.