The last time the building was open as Wonders of Life it was in horrible condition which may have also been part of the reason it was closed. The Body Wars queue had mold on the ceilings (I have a link to a site with pictures of it but I don't know if can be posted or not since it is another theme park site), most of the interactive exhibits like the bikes you could pedal with a video were shut down and/or closed off from getting to them and the whole place just looked like it was in a state of disrepair. The lack of popularity also didn't help.
3 days before Christmas, the place should have been packed right? I walked through the Body Wars queue completely alone (I saw no one ahead of me or enter the queue after me) and when I got to the loading area, there were only 4 other people waiting. The ride operator didn't even realize there were people waiting. The whole pavilion probably has less than 25 people.
Even 2 days after Christmas we went back to Epcot when the crowds were at peak levels. That day MK and AK were filled to capacity and comparison, Test Track standby was 150, Mission Space standby was 140, Nemo was 50, and Soarin was 160 standby. Body Wars was posted to have a 20 minute wait.
While I miss the pavilion (and most of the other 80's and 90's pavilions gone from Epcot), the way it was at the end wasn't what you would expect from Disney.