I don't really miss Wonders of Life too much. This was one of those attractions that Disney didn't update enough, so eventually it became just embarrassingly out-of-date. The last time I rode Cranium Command I was literally cringing at points because it was so 1980s. Norm from Cheers and "Hanz and Franz"... lol... if anything I was left feeling nostalgic.
However, what makes this sad is that the pavilion closed and was replaced with... NOTHING. At least other attractions that were closed you got something in return:
World of Motion is gone (which I liked), but Test Track is awesome
"Mr Toad" is gone, but "Pooh" is more up-to-date.
In the case of Horizons and Imagination, the attractions that replaced them were probably not as good as the attraction they replaced (definitely in the case of Imagination, maybe arguably in the case of Horizons/MS).
But for Wonders of Life, we lost a major attraction (Body Wars), 2 minor attractions (Cranium Command and Making of Me) and a bunch of activities and cool distractions and got basically nothing in return. So there's really no way to describe this except sad. :shrug: