I think this is kinda my thinking too. It's been clear since the second half of the Saints game that defenses were going to 1) blitz from the outside to keep him in the pocket area and/or 2) stunt to confuse the guards. We haven't seemed to adapt to either of these at all.
KOC has some good plays but a lot of them take too long to develop and Dobbs isn't a pocket passer, he's going to bolt if the rush gets there. Cousins stood in the pocket and took a lot of hits. So, maybe Mullins is a better fit. I admit, he played a lot better than I expected. But next year, I think we either resign Cousins or draft McCarthy.