I agree. I think this has a lot to do with the Oline blocking we have right now. I think came needs a little more room. He ran so well before the injury, and physically he seems to be nearly back where he was.
I think if the run blocking was going a little bit better and he had some time to get his momentum going downfield we would see him playing closer to the level he was before his injury.This might sound kinda obvious, because better run blocking will help anyone running the ball. But I feel like where is his most impressive as a runner is as he is entering the second level when he has good momentum moving forward.
Then again, this could be a result of him lacking some burst, that hasn't yet or may never fully recover.