The Land is still a great pavilion (although Circle of Life is really stale at this point) and I think Soarin' was a strong addition. Sure it would be better with footage from around the world instead of only California, but it's still a great attraction.
Imagination sucks. I think we can all agree on that.
Spaceship Earth is still good. yes the ending is lame, but I'd argue that 90% of the attraction is still great.
I haven't had a chance to ride the new iteration of Test Track, but everything I've heard says it's a massive improvement.
Horizons was a painful loss, but unfortunately was unavoidable. It was falling apart and built on top of a sink hole, there was really no way to save it. If you look at Mission: Space as it's own attraction rather than a replacement for Horizons I think it's a pretty great ride in-and-of-itself.
The fact that Wonders of Life is just a Food & Wine Festival pavilion is really depressing and I wish Disney would do something with that space.
Universe of Energy desperately needs some love, but it's still a good attraction.
Bottom line is Future World went through some dark times, but I think it's starting to be revived. The most recent changes have been fairly positive ones, and I don't think it's worth giving up on the old girl yet. Will it ever be as good as we remember EPCOT '82 being? No, probably not, but it can still be great again. After all, isn't that kind of the point of Epcot? looking forward to a brighter future?