I really don't think that these top ex-execs will totally come clean and spill it all. I believe they are playing another game and it's to remove Miscavige as COB ... oust him and take over the management of the Church.
Assume the worst: you are correct. This would STILL be a significant improvement as:
A. It would eliminate a MAJOR source of present day Co$ abuses.
B. The turmoil from such a move would likely create internal factions within the church, likely leading to further defections and quite possibly open schism.
C. Such events being reported in the media would result in further decline in the public's regard for the Co$.
D. Co$ would either reform for the better, or continue to limp along weakened and with similar policies under "new management".
On the whole, no real downside with definite upside potential.
Mark A. Baker