Sometime you may want to use your kick to set up your punch. In order to do so, you will need to move from your kicking range into your punching range. If you pull your kicking leg back, you will still be in your kicking range. Even if you can step in after that, it will take you an extra unnecessary step. If you don't pull your kicking leg back, your leg may be caught by your opponent, and you have to deal with it.

What's your opinion on this?