Kaep's biggest problem to me are fundamental... He seems to struggle to stay in the pocket and let plays develop and get to his 2nd and 3rd read,,.
He feels pressure and then either tries to escape the pocket... Or he throws prematurely without letting the play develop so he limits his options and makes it pretty f**king difficult for his receivers.
DC's started figuring him out when they started using these tweener style Safety/LB's who would spy on him to prevent him from burning them with his feet.
Most mobile type QB's go through it... How they deal with it will determine how long they last in the league...
Cam Newton would get it... But he improved his ability to hurt you from the pocket so it meant having a player as a Spy would leave you vulnerable at the back end of your defence.
So his ability to make plays in the pocket actually open up opportunities to use his feet... Which he does...