I agree with your general point. But I would say running Rham in short yardage situations is beyond challenging; it is counterproductive. I'm all for calling Jennings number for a while; it can't be worse.
I dont want to divert the topic but according to the game book from yesterday's game Rham had 14 attempts for 34 yards an average of 2.4 , this does not seem a lot. I understand you cannot measure on one game only. Was he held back because the Browns have a good run defence up the middle. Just trying to match the OP comment to yesterdays game
Running was hard up the middle for anything slower developing because in addition to being good up the middle normally, the Browns were pinching quite a bit and clogging the middle even more. It wasn't until Josh made an adjustment and broke outside with some misdirection and option plays did the running game start to open up. Stevenson never got any of those plays.