@Veiovis is right, let Scientology have greater focus on expansion through by birth rates. If we mix this with the Scientology setting up "communes"/"kibbutz", where the member can live, work and raise their children. We would see the religion being bigger, and the bigger it becomes, the harder it becomes for people like Miscavige to monopolize power in the Church, which would lead the cult becoming somewhat normalized.
Not really, Miscavige's takeover was very methodic and thorough.
From purging all officers and replacing them with henchemen, to destroying the organization ran by Hubbard's wife and ousting her, to controlling the flow of information from and to Hubbard, to the swift takeover of Hubbard's seat after his death and the supression of Hubbard's order indirectly naming his successors (not him).
Those methods working pretty will in monopolizing power in the largest country on Earth, there is little reason to believe they would fail at a Church just because it got too big.
The only way I could see it happening is by Hubbard clearly naming his successor in a tight undeniable document that Miscavige cant call false, like a his legal will and a video, and Hubbard's successor not being a madman like Miscavige and having the foresight to boot him out of the Church.
It seems to do better in USA than in the rest of the world, maybe the rest of the world simply values FREEDOM(tm) more than Americans does/s
Because USA is very wierd and apparently having your own micro city-state (gold base) where people are locked up and abused, is okay as long as you fall under "Muh 1st amendment!" protection.
Still, just because US laws allow for a stalinist-like micro parallel state to exist within its borders, doesnt mean most of the population or even a sizable part would wish to subject themselves to it.