What? I already explained how to go from flat to deep by simply by letting the man on your inside depart first. Fly half is deep. Kiw flyhalves do this. I think you miss the ball in how they create space. Let me help you out. Lets take the Kiwi's banker pattern for instance. the one they would use to establish a foothold early in games or to get back on track if things had become a little messy.
It is designed to attack the opposition fly half with a power centre (Ma’a Nonu). Nonu will have support from the blindside winger (Cory Jane).
He can receive the ball before the line or Nonu may offload to him through the line. If Nonu takes the tackle, Jane will act as a cleaner at the ruck.
In an ideal world the Kiwi's will make a bust from the the strike play but in case they have not done so they now go into a 31 pattern.
The pattern requires two more ball carries from power runners before they set up their strike shape from the sideline NZ will use guys like Jerome Kaino and Conrad Smith as the second and third carriers because they are effective at producing quality front foot ball.
Once they get to the edge (sideline), the rest of the team have formed a shape that is designed to threaten oppositions tiring defense.
From the wide ruck, the fly half has one support player on his inside and three on his outside.
He will also have four wide players that he can pass or kick to. At this point he needs to make a decision based on what the defence looks like.
If the defence line is tight he may choose to go wide but if the defense is spread out he may choose to take on the line with his support runners. It effective because it grinds down the defending team and allows the fly half (usually Dan Carter) to look for weaknesses in a tiring defensive line.
Yes that is the class of the man. Kiwi's have used that pattern in every world cup game. Go have a look.