Kriel is a strike runner, not a playmaker. He fulfills this role very well. He is also an effective chaser. Defensively? A bit hit and miss.
Damian is another matter entirely. It's quite remarkable that he has persisted as long as this. In 2013 his performance at 13 against Argentina was catastrophic. He someone how himself at 12 for the Boks on the back of media hype in 2015. There were a few shapes and plays that the Stormers uses to get him on the outside edge of the defence. For some reason he was tauted as a playmaker. The analytics didn't pass the test. Then came the Wallaby test where every point on the board was the result of a Damian lapse. Kuridrani in particular dominated him from start to finish. The media were collectively happy with the performances, so he was now a world class Bok. From there he became untouchable. It was Meyer who gradually through the course of that season carved out a role for him, dropping the familiar schemes the Stormers had used as the Wallabies and All Blacks exposed them quite ruthlessly. This became the blueprint for him ever since. A dour possession carrier from phase to phase. Remarkably, he will be regarded as a Bok legend for generations. It's funny how some people meander through life like this.
I don't think there is anything Esterhuizen could possibly have done to change the mind of Erasmus. He doesn't seem to trust the offload as it adds an uncontrollable variable to his rigid script. Erasmus needs to control where the ball moves at all times. It doesn't matter how predictable it may be. He relies on statistics. That desire for control has crippled the Boks for years. The talent is there, but we have never seen the Boks reach their potential over the past 10 years. Passive and obedient trumps talent and ability.