Just adding a little input here... let's say someone in upper management forces Bo to make some staff changes. Since a lot of people are making comparisons to corporations, let's assume the meeting is run like a performance review would in a large corporation.
First. Identify the problems. Those would be the blowout losses against teams that are more or less on equal footing talent wise, sloppy performances, mistakes, and missed assignments. By Bo's own words, they (the players) failed to execute. Bo believes in his system, that much is for certain, and the problems come from sloppy play on the field, and a lack of significant improvement by players over the course of their career, except in the rare case that a player seeks outside help (T-Mart, in this case, and though he never became a GOOD QB, he did improve). Last, but not least, a lack of Conference or National Championships. It could be assumed that, with our current level of talent, we should be capable of winning the B1G, if it wasn't for (in Bo's words) poor execution.
So, is it a lack of talented athletes? I would say no. We have highey talented athletes, good enough to compete in this conference. So the issue is not in recruiting, though some improvement can certainly be made in that category.
So, is it a poor scheme? In some ways yes, and in others no. Bo, no matter what many on this board think, is tremendously knowledgeable about defense, and his schemes are solid. It's true in my opinion that he needs to be much more open to mid game adjustments and open to adding to or changing his scheme, but it's not the scheme itself. Bo's scheme is similar to what a number to teams have great success with in power 5 schools (MSU, Bama, VA Tech, tOSU, and many more use a 4-3, nickel, or 4-2-5 formation with both man coverage with 2 high safeties, rotating cover 3, quarters, or cover 1 robber coverages) and Bo's schemes have worked well in the past. But they could certainly use some updating.
So it comes down to execution. What does that mean? It means the skill and knowledge being properly taught to the players to enable them to perform their duties to as close to perfection as humanly possible. This is where I feel the major problem is. The players aren't being properly taught and developed in this system. And a guarantee you one thing: there is no possible way that Bo, Pap, or Beck has enough time in practice to teach each player one on one enough to properly teach and develope them to their fullest potential. That means that the coaches who's duties include player training and developement aren't doing their jobs right. Most of the defensive position coaches are failing hard, but it's too early to truly determine how effective Charlton Warren is performing. Papuchis seems to me to be something of Bo's protégé, a guy Bo is trying to turn into a great defensive coordinator, but Bo is doing most of the actual coordination. Pap can stay or go, it won't matter either way, because Bo will still essentially be the DC.
It's pretty easy to see that the o-line, TEs, and the WRs (when trying to run routes and catch balls... basically doing anything but blocking...) are not being properly taught and developed, and doubly so for the QBs. Basically, everything but the RBs aren't being properly taught. Beck can certainly use some adjustments to his scheme, like a greater focus on running the ball, and he definitely needs to work on the short and intermediate passing game, but his overall scheme is good enough. I'd move the current WR coach to o-line/TE coach and hire in a proper QB coach who can help our guys develope to their true potential. Ron Brown is already doing a fantastic job at RB coach.
If there is going to be any significant coaching changes, it'll be to the position coaches, and should at least help is win a conference championship. Bo is toone loyal to Beck and Pap to get rid of them, and if they could get properly developed players, that has a pretty good chance of turning things around.