If i was Kraft here is what i would try to do, obviously it takes all parties agreeing to it which might not happen, but assume a perfect world for a min.
Step 1 is prepare for free agency and the draft, at this point a new GM isnt going to be able to do Jack diddle squat besides rely on the scouting already done so might as well have Wolf keep doing what hes been doing while scouting a long term GM to hire now but officially promote in May. I have no idea who that GM is but i trust the krafts to do thier due diligence and get someone competent. **** it may even be wolf.
Step 2, gracefully start the transition away from BB as god of NE football operations. For all those people who want him out of the building i have to ask what you are smoking? The man is a genius and a football savant who has forgotten more about the pigskin then everyone else here combined. Granted he will be 72, the latest rebuild bombed horribly, and he has 2-3 years at most left before retirement but he is still an incredibly valuable treasure trove of information and strategy. You milk every last drop out of him you can get.
I want him in an ernie adams kind of role for the next HC, no power or final say so in decision making but give him full and complete access to research whatever the hell he wants. Have him in the HC ear on gameday so when they go hey who was the guy that replaced lou? Oh yeah wallie pip. Every coach needs a guy like that. Take a couple days to scout a team and get some in depth game winning practice tip like the butler pick. Go to any position group and coach technique and fundamentals. Attend and give input to any coaching meeting that peaks your interest. I think if given the freedom to just add to the team without the pressure and responsibility of being THE man BB would be a huge assest.
Step 3. Coaching staff. With BB stepping into an advisory role that opens up the HC spot and i want Mayo in it. Yeah his nickname is Bellichick jr and do we really want more of the same? I say a 30 year younger, more energetic BB? Sign me up!
I do think there is something to Bills message getting lost to a younger generation. Im 40 and have two kids 15 and 6. Watching my mom interact with them slams home just how much the world has changed in the past 20-30 years and the older generation (IMO and from my POV) just hasnt kept up and refuses to try. I may think thier tik tok dances are stupid but i at least know what they are. My mom only asks them basic boring crap they could not care less about like "how are you doing in school?" Mayo being 30 years younger and able to relate, especially as a former player, is a factor i dont think gets discussed enough in why he would be an excellent HC. Plus he has played for and been trained by BB so the transfer shouldnt be as jarring. Keep the traditions and strategies that work, while wrapping it in a younger fresh message that the players dont roll thier eyes at going "ok boomer"
Now to get our first year HC some help. Keep Steve as DC and let the D stay as much the same as possible. They fit the modern NFL and with even an average offense would be contending for the playoffs/superbowl.
Offense keep BOB as OC but let him choose and hire a WR, TE and Oline coach. Whoever he wants. Make it clear BOB is in charge of the offense while reporting to Mayo. Love me some Bingo the football player but sadly TB80 the football coach has to go. Same with Klem and i dont even know who the TE coach is which tells you everything you need to know there.
The only position coach im forcing on BOB is QB and thats McDaniels. Im hoping and praying Maye makes it to 3, plus bringing in a flacco, Mayfield, or cousins. With that QB room i want to give the rookie every possible advantage of sitting, learning, and basically the opposite of what they did to Mac. Not being thrown to the wolves, having a veteran to lean on and take the pressure of starting off, and a consistent coaching voice for a couple years. Plus that gives Mayo 3 former HCs to take advice from.