Thanks for bringing this topic up!
From my own experience - through several years, I've succeeded only in getting my wife not too active in the ministry, becoming less fanatic about some rules, less admired by some teachings (at least, really crazy ones like 'overlapping generations'), but she's still PIMI, believing the basic stuff and following the basic rules. Looks like that's a limit of what she can bear, so far. Not sure how much time is needed to make a next step - which is basically PIMO. Will keep you guys posted (if anyone cares)