If Sean Snyder has actually moved onto the coaching staff, then it's too late -- Bill's "Final Solution" has already begun.
First, get Sean on staff for a year or two, gradually moving up in importance.
Next, come down with major illness, and put Sean in charge just before that season's KU game.
Sean follows Bill's gameplan to the letter and defeats the atrocious Fighting Gills.
Later that week, announce that the illness wasn't as bad as thought, but will require stepping down to stay on top of treatment. Also say that the program is on solid footing with Sean in charge. At that point, he shirt-tucks with money get into a frenzy and demand Sean be offered the job -- after all, he fits the criteria: 1. Name is Snyder. 2. Beat KU.
JFC, Bill is a guy who forces assistants to work 18 hrs a day, even if it involves staring at the wall to get the hours in. You think he's going to let Currie pick his successor without a fight? He's probably spending 18 hours a day in a tanning bed right now, laughing his ass off.