Here is a stupid idea: if Matt Rhule is indeed our guy (I don't feel strongly about him or anyone else, but he is the flavor of the day at least)...would we be able to hire him right away? Bring him in as an analyst for the rest of the season before promoting to HC?
Or...what if we fired Duvall and hired Rhule as interim S&C coach? Analysts aren't supposed to interact directly with the players, right? But the S&C coach works as closely with the players as anyone, and we always see him on the sidelines during the games. Bringing in Rhule as S&C allows him to build rapport with players and be a part of the team without disrupting the game-planning from the current staff, although he could pitch in his thoughts. This might allow a smoother transition, let Rhule build chemistry with players and other coaches who he might consider keeping, and trainers could finish out the year on the S&C side.
Or, that could just create an awkward clusterf**k by having the future HC hanging around with a lame duck staff. Anyway, I told you it was a stupid idea. Go f**k yourselves.