yea, unfortunately I feel like Epcot does not have a list of good quality rides especially compared to other parks in the world. It's definitely a more ambiance park.
I always like Living with the land and Space Ship Earth. Living in the Land was a great attraction back in the early 1990s when I was a teenager. My parents had a garden back when I was growing up plants and and having an attraction that shows plants being grown interested me.
Part of the problem is Disney did bad updates for Rides for Epcot from my view. Imagination ride version 2 and 3 are terrible although 2 is even worse than 3.
Soarin' around the world is a step down from the original. A lot of locations for Soarin's around the world makes landmarks looks distorted unless you are at a certain location for a seating standpoint. To top it off, It is CGI fest.
Test Track really depends on the person due to the big difference between Test Track 1 and 2. Mission: Space green team is worse than first, but it could be based on what I saw before the update. The green team was turned in a outer space version of Soarin' around the World Basically.
The nature of Epcot itself back in its prime was not meant for thrill ride central although A couple plans went through that could've changed the image of Epcot a little bit from a ride standpoint and World Showcase was supposed to have a lot of more rides than it ended up with. Not all World Showcase rides planned were going to be boat rides despite Germany, UK, and Italy had planned boat rides. World showcase itself has a bunch of planned countries never built including Venezuela having a aerial tram ride through a tropical rain forest.
Mount Fuji roller coaster was supposed to be part of the Japan Pavilion. The plan of Mount Fuji was in the 1980s', but it still was mentioned as a future attraction during WDW's 20th anniversary special with John Lithgow back in 1991. Disney had plans of Matterhorn being part of the never built Switzerland Pavilion for Epcot. The Epcot version was supposed to have a 192 foot tall mountain with the entire ride system being inside the mountain aka indoor rollercoaster.
Those two coasters are what if for Epcot if you are a Coaster fan. Before Switzerland Pavilion gets criticized for another European Pavilion, there plans of Epcot showed more variety for regions around the world such as Venezuela, Coastal Rica, Iran, Israel, United Arab Emirates and Equatorial Africa being part of World Showcase. What the unbuilt World Showcase pavilions showed, World Showcase was supposed to have a better balance in regions although it did seem heavy for the Middle East in terms of Iran, Irsael, and Arab Emirates.
I did not mention Brazil because that not really an early planned pavilion compare to the others mentioned.