I have a simpler list.
1) Decide whether to promote or fire Snead based upon Demoff's knowledge of Snead's input into various picks, trades, and FA moves vs those of Fisher. In any case, the GM should be given full authority on player personnel matters.
2) The GM, together with Demoff, should hire a new HC. Preferably one that has already demonstrated HC competence. Could be a Harbaugh, but could be an exceedingly successful college HC with a tremendous winning track record. Saban, Meyer, Peterson come to mind. Please, no dinosaur retreads such as Martz, Coughlin, Mike Shanahan, etc. Only fresh new up and comers if they're gonna pull from the NFL ranks, please. BTW, I'm leery of hiring an existing OC that would want to call the plays while carrying the title of HC.
3) Stand back and let the GM bring in the talent and let the new HC change the atmosphere and demand results from his new asst coaches and all of his players, both old and new.
4) Prepare for full attendance at games and start printing playoff tickets. Lol.