He's hard on himself, which proves he wants to learn. It also shows he wants to do what is right for the team and that quality can't be understated.
It's not easy coming from a touch background. He has skills others can only dream about but they often don't work on a rugby league field. It takes time to understand the game and it's why people need to be patient with Johnson.
He's played nearly 75 NRL games now, which means he's a bona fide NRL player, but it often takes longer for New Zealand players to make it.
They grow up playing a happy-go-lucky style that lacks structure because many players can simply rely on their size to punch through holes. Let's just say completing sets is not a priority.
It's different in Australia, where players are generally smaller and quicker, and they learn to let the ball do the work or develop their footwork.
Johnson needs to learn the balance between when to control and when to use his natural instincts because there's still room for creativity and second-phase football. We saw that a couple of weeks ago in the Warriors' great win over the Storm when Johnson played what is in front of him.
I think we'll see the best of Johnson in a couple of years but we need to see further development this year in his ability to control games.
Simon Mannering is also trying to find his niche as a leader. I can't think of a more complete defender in the game, and what he achieved in the Anzac test was phenomenal. It astounds me what he achieves every week.
He's someone who is exactly what teams need but he's still developing as a leader and is still learning what to say and when to say it during games.
For someone who does so much work, and plays the position he does, he gets very little time to see what is happening in a match. It's hard to come up with the right thing to say when you have your head down so much.
That's where backup from other senior players is essential. He probably doesn't have as much help as he needs with both the Warriors and Kiwis, especially when Thomas Leuluai is absent, and it's an area both teams need to improve dramatically.
A lot of work is being done on developing leaders but they're just not coming through as quickly as hoped and it's probably reflected in results in recent times.