I feel where you are coming from, and tbh I'm not sure I want Cam running into lb's much anymore, the man is 30, but part of what you acheive when your qb is a threat to run the ball is to force the defense to defend 11 men instead of 10. That was the appeal of the wildcat when it was briefly popular before defenses figured it out. If you take the qb out of the equation as dead weight on a running play, it makes it that much tougher on the defense. By the same token, if your qb is a viable threat to run the ball effectively, he must be accounted for even if he doesn't carry it every time.
What I would *really* like to see if Cam comes back healthy is some short yardage misdirection options maybe utilizing 2 rb's, or Armah, CMC and Cam, where out of one formation we can show multiple options using those 3 guys to attack the line of scrimmage at different points and leave defenses guessing where the ball is coming from in who's hands. That is where you get into some really fun stuff over time where the other team sees you do it one way on film, so next time you break out a different option out of the same formation, then a third, etc etc. Keeps em guessing.