Shooting Fluidity, Rhythm and Power

How would you develop a one-piece shot like Steph Curry and not have the "Shawn Marion effect"? I understand that it's truly impossible to have a true one motion shot because even Steph has two movements in his shot, the pause however almost goes unnoticed. I've noticed that the longer you pause, the less power you have from your jump. This is the reason that Steph can pull from anywhere with ease. The shorter the pause, the quicker the shot, the more power you have and the less you have to jump. It's the completely opposite when you start to pause longer.