For what it's worth, some places like Football Outsiders at least attempt to capture QB value with more advanced metrics than TD vs INT, including scrambles/rushing, and they found Cam's season last year to be absolutely poor, bottom of the league even accounting for the plays he made with his legs. He was better than average as a runner (for a QB), but so much worse than average as a passer (and decision maker) that his overall numbers were still pretty bad. There isn't as much tension between these two opinions as people are making it seem. Yes, a QB can provide some benefit with his legs, but it is sort of like giving a pitcher in the NL too much credit for being a good hitter, simply because 90% of his value should come from throwing the ball.
It doesn't mean that he can't improve this year, with better health, better weapons, a full offseason to practice with the team, etc.. But last year already happened, and he was quite bad as a QB, even if you give him full credit for his rushing TDs.