Much as Chol has been unreliable and has been found wanting too often, the thing about Chol is that you can pick him as a tall who can ruck and mark, but the cost in terms of speed and ground ball competitiveness is less than with most talls. He can run fast and an gather a ground ball. You put CCJ in and you lose speed and ground ball gathering, you put Chol in and the cost is lower.
I'm still not sold on Chol, but he is only 24 and the unique attributes are very attractive.
At the moment I would say Chol has had many chances, yes, give him a couple more chances but CCJ would be higher on my list of players who need to be tried in the seniors.
DS