If we didn't have CW I would be less concerned.
McCarthy guarantees you develop CW, is Guaranteed great regular season HC.
In 4ish years if McCarthy is crumbling in the playoffs then you replace him.. at that point CW has already been properly developed.
BJ is a Great OC when given a vet QB and given a great OL, but BJ has never developed a QB, has never been a HC. We are rolling the dice on CW development that he will be a great HC or will be able to develop CW.
If BJ fails in 4 years we will be in the market for a QB and a HC.
I don't hate it.. but a sure thing does sound good when the Bears have never developed a QB