I agree, it comes down to trust you have in him in making plays in key situations. So many times this season he has had critical drops when the team needed a play. You could point the KC game when he dropped a pass that would have got the Bills out of hole near our own goal line or many other key drops when the team needed it. It's been a huge problem all season long and he is not making enough big plays that outweigh the negative plays.
He open for a reason, most teams have their weakest corner covering him. Beasley was not as fast but was sure handed and always seem to find open spots, when I see Josh holding on to the ball I believe it's because McKENIZE is his only option and there is no trust in him.