Here's the thing. If you can see Soarin' at a different time other than EMH, see it outside of EMH. Everything else shouldn't be that crowded. We walked onto Mission:Space our EMH night we did last summer. We also had a show of Crush's Turtle Talk nearly completely to ourselves. We explored the Living Seas and were nearly the only people in the building. Spaceship Earth was a walk-on and Test Track had FastPasses up and running so we did that. Additionally, you could see the American Adventure on your way out back to the Epcot resorts.
The EMH is worth it if you plan on NOT doing Soarin'