They dodged a bullet by limiting Franz's power in the 1970s, especially after Knorr passed away. Franz strikes me as a guy who would have wanted to rebuild the organization the way Rutherford did. But radical changes would not have been good for the rank and file, especially right after the 1975 fiasco. Franz would have driven the org right off a cliff.
The issue today is the lack of charisma among the GB members. Too many old guys who are used to preaching to a captive and obedient choir, and have never thought about how they come across to potential recruits. And with a constant presence via videos and social media, the mystique is gone. When you look and sound like a clown or a cartoon, it's tough for people to take you seriously.