Nobody seems to be able to fill his shoes, and it shows.
The brutal irony is anyone presenting the vision and charisma that the Organization desperately needs, will invariably pose a threat to the current power structure within. There’s no way anyone of any real talent and consequence could be tolerated in there. Anyone like Franz would have to be immediately subjugated upon discovery, lest these powers end up in the ‘wrong’ hands. If these talents can’t be made to serve the current rulers then this person would be promptly expelled. The talents that the Organization needs for its health and future have been rendered anathema to it.