As Arnie stated, there are enough optamists and sociopaths to keep the organization going. Unfortunatly, they will not just go out of business. No matter what they say, no matter what illegal activites they can get busted for, there will be people that will keep the organization going in some capacity. And IMO, if these changes are so drastic that it turns people off, there will probably be some kind of revolution and DM gets replaced.
Things like this will hurt the organization, but it won't kill it.
What will kill the "church" is the fact that nobody wants to join. L Ron talked about fresh meat. Well, thanks to the internet and many critics, everybody knows what $cientology is all about. Everybody who never joined $cientology knows who Xenu is. In fact, I would bet that a larger percentage of the non-$cino American public knows the story of Xenu versus the percentage of $cinos (as I understand it, most practicing clams have not reached OTIII). What will eventually kill the "church" is the fact that the current members will leave in one way or another (quit, be declared, or die). If nobody replaces them, the numbers dwindle down to zero. Things like this will speed up the process, but I doubt it will kill the organization.
What it will take to totally handle scientology and other practicers of mental manipulation, will be something like what is done in Germany to inoculate school kids against the evils of the Third Reich.
Kids there go on field trips to visit more and more profound horrors of the Reich.. so that all citizens of Germany will have it instilled into them the consequences of menyal manipulation.
This is also why Germany has listed Scientology officially as a "Threat to democracy" - they know exactly what they are dealing with.
Hopefully in America, the horrific acts of what passes as a democracy, including the techniques of mental manipulation, will someday be taught to schoolkids... while they are young enough to decide deep inside "Never again" to allow the animalistic survival psyche to act without compassion, when there are civilized options.