While I agree, I think McCoy helped take a lot of the weight off Carr's shoulders. He was identifying fronts and those responsibilities were taken off Carr's plate. It's why things looked so disjointed while McCoy was out/injured.
On the flip end, I'll say that we saw a lof of those blocking schemes with TE's blocking edge rushers that failed, and miserably when it happend. It wasn't as big because Carr was getting the ball out in a timely fashion in this scheme, but the "quick game" was also something they highlighted in the off-season that they would implement to help Carr.