I want to see how the rest of the season goes but from what I have seen....
Keep Champ, keep AP and most of the staff. I think Bo should get a good shake at OC. Bring in a few more coaches to fill in at least LB and QB coaches.
Champ is/was well respected in the NFL. He likely would have got the GM role if not for the McD/Ziegler package. Getting him at the Assistant GM was a coup for us. We don't know a ton of what Champ had for talent eval on the players we have selected in the draft or signed via FA but it sounded like on more than a couple of the busts, what we have heard was that they were more of McD than even Ziegler. With not having that undue influence, I would like to see what Champ does and hopeful it would be even better than what we have got out of the front office in recent years.
AP is a similar type of HC as Bisaccia though in different styles. Both are very much "players coaches". Their strength isn't X's and O's of the game (which really, for a HC, it doesn't need to be, that is the job of the OC and DC) both were raw in terms of game management because this is their first time in the role. But what they do is get the players to play hard. You hear the 'they are professionals, they should play hard anyway' but the reality is that they are people. In my view, the most important skillset for a HC is pure leadership. Teams of people respond or don't respond to leadership. The biggest failing in McD is that he is not a leader. He has learned a very dominant, critical and demanding style of leadership from Belicheat. As much as I don't like Belicheat and think he is tragically over rated due to Brady's success, even with him being basically an jerk, his players respect him and rally around him. McD didn't. But AP does. He connects with the players and the locker room. He also isn't trying to import a foreign culture to the Raider organization like McD did, essentially trying to make the Raiders the Patriots in the West but AP grew up a Raider fan in the Bay Area. He knows, understands and embraces the Raider legacy of having that swagger with the toughness and passion to back it up. This Raider team has regained that under him. I also love that he is self aware and humble enough to know he isn't a finished product and has gone out and asked for coaches he had relationships with as a player to mentor him- a SB winning HC and a SB winning DC with some decent success as a HC and it is all public. Not hidden because he is embarrassed acting like he knows everything but actively trying to get better. That is what real leaders do.
Graham has won the job. It would be a travesty for us to move on from him if for some reason we decided AP wasn't the HC. After a few years, it looks like he really has this team understanding his system. I posted it before, since AP took over, we have the 3rd best defense in the league. We have to go back to the early 2000's before have had a defense anywhere near as good.
At this point, I have no particular coach that I think we need to move on from.
The most likely target for people wanting a change is Bo. I would understand that but at the same time, let's look at the situation Bo is in. He took over an offense that was absolutely in shambles and ineffective placed in by the previous HC and OC. He took over mid season and while trying to turn a pile of poo into something that moved the ball, also had to go through the learning curve of being an OC for the first time while still holding down the QB coaching duties as well. I wouldn't pound the table for Bo but I wouldn't pound it against him either. I really want to see how the offense performs over these last three games to ge a leaning on him either way.
I believe, at this point, Davis will stick with Champ and AP. Bo is up in the air for sure. It likely will have a lot to do with what AP wants as well as how they perform. I think Davis is kicking himself for hiring McD instead of keeping Bisaccia. Apparently several of the star players have already voiced their support for AP. I don't think that Davis will go against them again. The most likely candidate that I think he would eject AP for is Harbaugh and apparently Harbaugh is in deep talks with the Dolts which tells me he hasn't got the feelers out from the Raiders.