For standup everything revolves around good footwork and stances. When on the ground everything will revolve around good floor position,(a floor stance), and transitional technique,(foot work), moves.
For the average person in todays fighting society developing a good horse stace is important so as to develope their "feel" to control these areas,
1) neutral torso position,
When working out of a forward or like stance the average person will tend to lean a little to far forward or to the rear. Practicing a horse stance position will help a student to develop the feel of a neutral torso position.
2) leg weight,
Again when working in various forward or like stances the average student will tend to place more body weight on one leg than the other and they will not realize it. A neutral horse position will allow a student to "feel" weather is leg weight is equal or more on one side than the other.
3) foot weight pressure,
Again in the various other stances because the body is turned etc. the average student will not learn how to feel the weight pressure on the bottom of his foot. This ability to feel foot weight pressure is very important because where the weight is being placed on the bottom of the foot will determine if you are what is referred to as,
a) light, fast fluid footwork,
b) medium, a general all purpose position,
c) heavy, for applying heavy power of continous rapid strikes.
So for the average lower ranked student some training in the stance is important to develop the above mentioned areas.
I personally do not believe in using the "horse stance" for one vs one fight training. It is a tool that can help the lower ranks to develop their much needed "feel" of wight.
Just my views here and nothing else intended.
:ultracool