Small World to Epcot is a good idea. Here's an idea....
Step 1: gut Imagination and turn it into a "Unity" Pavilion. Put IASW in the Imagination show building. Also, reroute the Soarin queue so that Soarin is part of this Pavilion (I think this is a Grassey idea). Use the theater for a Zootopia show that celebrates the progress that we have made in diversity. This would be a great pavilion for "World Celebration"
Step 2: Expand the "Play" pavilion to a "Imagination and Play" Pavilion. Build a new Figment ride with Dreamfinder off the back of the Play pavilion.
Step 3: Tear out the IASW load building to widen the walkway. Use the IASW show building as queue and load for two attractions: A tangled ride and a second attraction. Build the show buildings for these attractions behind (to the north) the current IASW show building.
Sorry for going on an armchair rant.