If all the lies got exposed, and the Morg was forced to admit it was all a fraud, then the church would just become another protestant religion. A good deal of the members would stay for the sense of community. Heck, if they admitted it was a fraud, and dropped a good deal of the lunacy, some of us, myself included, might even return, provided the new church did not try to micromanage my life, but remained a simple social structure.
or put another way: could LDS temples really be converted into luxury hotels, and ward houses converted into community centers? well, lets give it a nice try! and will staunch LDS find some other way to micro manage each other and annoy the Hell out of outsiders?