I'm not talking about Universal whose IoA park wasn't drawing people, Uni adding Harry Potter is like AK adding Avatar, both places needed a big draw, but Epcot has always been a big draw, it's generally in the top 5 of theme park attendance in the world even now in it's current state... and no offence by your "by the numbers" rational is the root of the problem I'm talking about, I think the need more artists and less accountants planning their rides
And it's not like they incapable of doing it either, the lobby of the new Art of Animation hotel looks very modern and Epcot-esque to me
And Energy is such a simple theme, all energy come from some type of atomic reaction, so all they would need for a ride is some combination of the concept from to old Disneyland "Adventure Through Inner Space", shrinking people down the size of an atom, and add in some Disneyland Paris roller coaster tech like their version Space Mt, Rock n' Roller-coaster, and/or the Crush-coaster... so basically a high speed thrill ride through images from electron microscopes would do the trick...
and they could simulate the same kinds of imagery if they hired some one like this artist Bill Munro, who makes sculptures with fiber optic lights
so my point is... it took me all of 20 minutes to come up with stuff that fits the the theme of Epcot's Future World and the Energy pavilion... this ain't that hard if you bother to try