Oh I've seen them, hence my comment. Come on, we all know the shows I'm talking about. Every chain park has at least one show with a few random performers lip-syncing or karaoke-ing to some top 40 soundtrack. I've never understood why these shows are so prevalent when they rarely have much of an audience, but it seems like some parks just want to check off the box for "live performances". Sometimes even certain SDC performances fall into the vein, but at least here we always get actual singing and usually a backing band.
There are some good, or at least entertaining, shows here and there of course. Not saying they are ALL bad.
My point remains that SDC is special in their emphasis and execution of stage shows, and it would be a shame to drop the ball by not replacing Wonderful Life with another good show.