Those names mentioned will get their chance but they are still quite raw. Don't forget it's a big step from NZ first class to test match cricket. You have to be really special to get a crack in test cricket without a few first class seasons under the belt. Some are good enough to learn their game at test level but very few. Can potentially be a case of lambs to the slaughter. The thing about guys like Guptill that tend to fail a lot have actually proven they have the mental edge to cope with failure (in his case his technique will never be good enough for tests) but a young guy might not be able to bounce back from the mental blows as easily.
Those names mentioned will get their chance but they are still quite raw. Don't forget it's a big step from NZ first class to test match cricket. You have to be really special to get a crack in test cricket without a few first class seasons under the belt. Some are good enough to learn their game at test level but very few. Can potentially be a case of lambs to the slaughter. The thing about guys like Guptill that tend to fail a lot have actually proven they have the mental edge to cope with failure (in his case his technique will never be good enough for tests) but a young guy might not be able to bounce back from the mental blows as easily.