The cover 2 thing is concerning because we have multiple guys who can threaten the seams. So it's concerning to not see that adjustment.
I think it's a mixture of everyone, but most of the blame still goes to the coaches IMHO. The way this entire team is falling a part is something to behold. It's the offensive coaches job to put the guys in position where they do what they are good at, and stay away from what they don't perform well.
If Carr doesn't trust the plays and is doing his own thing, WHY are we calling those plays and implementing them into the gameplan?