Good balance is a function of the step-by-step learning approach. This requires you to be fully aware of what you are doing at every step of the way. If you just rush through the doing without giving due diligence to the steps then you will miss out on a lot of crucial biomechanics.
Though my students are still some way off from learning the Open-Close form sometimes I use it to explain what I mean about step-by-step because of the nature of the small movements of this form makes it difficult to see what is happening.
A basic movement phase like put out the leg, shift weight forward, shift rear leg to half step, pause, pivot, repeat is very simple to do. If you get the hang of it you can do it very fast just like the way you would apply it.
But if you don’t study the mechanics closely even if you are moving slowly you will not be able to retain good balance nor issue strong power or be able to turn / shift quickly and be ready to defend and attack swiftly.
A movement like putting out the leg takes at least three major steps with each step meant to teach you how to balance properly without wobbling yet still retain power. If you do this well you can feel the power go to your foot and when you do kicking you will be able to apply power.
When you shift the rear leg forward in a half step you must also do it such that you entire body moves as a unified unit so as to maximize your forward moving momentum. Again to make learning easy I would break this down into three steps.
In order to turn the body to a different direction I use three steps for the process of stabilizing the body so that you would not wobble when turning and the turning motion can be used to trap and unbalance your opponent.
The above is just the legs’ biomechanics at work. I have not mentioned about the rest such as the kua, tailbone, upper body, arm structure, etc.