No.
Being unable to change direction in the middle of a shoot is not about losing control of your balance, it's a matter of being commited and already throwing your weight behind it. If someone cannot pull out or change direction in the middle of a shoot, it is not because he does not have control, that is just the nature of the technique. It would be like trying to stop a powerful kick in mid delivery when the leg is already extended. Not easy to do.
When I compare a good shooter to one who is not good, I am referring to the fact that one who does not know that technique well is likely to start a shoot at the wrong moment, or from too far away, or to telegraph his intentions for said shoot. This is the person that is more likely to leave himself vulnerable to an attack such as a downblock on the back of his head or neck.
Have you ever trained in proper shooting technique? If you have not, believe me it is not as simple or easy as it looks, and is not as easy to defend against as it looks either. The most effective defense against a well trained leg shooter is a properly timed sprawl or at least a side step movement, period. (good luck on that side step though) As I said before, if you want to add an attack to that, be my guest. It may make it more effective. But do not let that attack interfere with your foot movement as that is the most important.