I think that the first place to start is with their college program. Get graduate students to take part in professional internships. Mechanical engineers who work in various energy sources should work at Ellen's Energy Adventure. The ride should be shortened and they can use the extra space the make a more interactive area. They could have things that would help the guests understand better how much energy is used to do certain things. Guests could ride a stationary bike to try and power a light bulb. They can design their own roller coaster, choose the energy source, and then choose how much energy of that source they think would be needed. Then, like in Sum of All Thrills, they can ride their design. If they didn't use enough energy, the ride just stops. If they chose too much energy, they could go shooting off the tracks and it will tell them why that happened. They will have information on solar and wind power as well as coal and natural gas. People can get better informed about what we currently use in certain situations and where the experts think we are headed. All the while, there are masters and PhD students who are on the grounds to answer questions. When they aren't answering questions (which would be one or two days a week), they would be doing actual research on the grounds there that pertain to their thesis or dissertation. You do something similar at Test Track, at Mission Space with aerospace and aeronautical engineers, and at the seas with marine biologists and oceanographers. At The Land, you can have guests grow their own plant. They can choose their plant, the type of soil or other support system, how often to water, how much light, etc. Then, you give them a card that has the link they can go to on a website to check in on their plant. It will be updated weekly with pictures of the plants and the experts can give their recommendations for how the plant could better thrive. Basically, it needs to be more interactive and more informative of where we currently are and where we think we might be headed. With college students coming in to help work these pavilions, Epcot is assured to always be in on the latest ideas.
Oh, and for the love of all things good, The Odyssey and Wonders of Life need to have something going on in them. No more vacant buildings, please.