This kinda makes me sad that we clearly have a great athlete in our QB but he either isn't being allowed to or told to do what he does best, imo. I've thought this the past 2-3 years. He could have run it 1.5x to 2x more. He rarely ever gets stopped for a short yardage run.
I agree that he could have probably done a lot more damage as a runner. However, it seems we've never had a suitable back-up to him should he get hurt. Also I suspect year after year they've wanted to have him think and act like a "passer" since that's more important and where he needed more improvement.