If we change the standard of registry we will be changing the conformation for the worst.
We will reward breeders for producing conformationally incorrect horses.
We can not allow the ulterior motives of a few individuals change a registry that has been successful for 40 years.
We need to keep measuring at the last mane and reward good conformation.
Here are what other breeds say about the withers.
AQHA
Withers
The ideal withers are sharp, prominent and slightly higher than the horse’s hindquarters or croup. A balanced horse will appear to be sloping downhill from front to back. When the withers are higher than the croup, the hindquarters are properly positioned under the body and contribute to athletic ability. Strength of the top line, over the back, loin and croup, also is important in athletic ability and overall balance and soundness.
Arabian
The no-nonsense conformation requirements in the 2009 USEF Rule Book's Arabian, Half-Arabian and Anglo-Arabian section read: "Comparatively small head, profile of head straight or preferably slightly concave below the eyes; small muzzle, large nostrils, extended when in action; large, round, expressive, dark eyes set well apart (glass eyes shall be penalized in Breeding classes); comparatively short distance between eye and muzzle; deep jowls, wide between the branches; small ears (smaller in stallions than mares), thin and well shaped, tips curved slightly inward; long arched neck, set on high and running well back into moderately high withers; long sloping shoulder well laid over with muscle; ribs well sprung; long, broad forearm; short cannon bone with large sinew; short back; loins broad and strong; croup comparatively horizontal; natural high tail carriage. Viewed from rear, tail should be carried straight; hips strong and round; well muscled thigh and gaskin; straight, sound, flat bone; large joints, strong and well
defined; sloping pasterns of good length; round feet of proportionate size. Height from 14.1 to 15.1 hands, with an occasional individual over or under. Fine coat in varying colors of bay, chestnut, grey and black. Dark skin, except under white markings. Stallions especially should have an abundance of natural vitality, animation, spirit, suppleness and balance
Morgan
The withers should be well defined and extend into the back in proportion to the angulation of the shoulder
Equine Science textbook
Withers – The withers is the high point of the horse’s back and is located at the base of the neck between the shoulder blades.
The withers should be prominent and capable of holding a saddle. It should be muscular and well-defined at the top and extend well into the back. The withers serves as a fulcrum over which a ligament attached to the vertebrae in the back and neck acts to help raise and lower the head and neck.
Horses with low, round, thick withers often have rolling gaits and heavy front ends. A flat, mutton withers will not hold the saddle in place. When the withers is prominent, the ligaments and muscles that attach the neck to the thorax move freely and the horse exhibits greater flexibility, coordination and energy in its movement. High, sloping withers with long, sloping shoulders increases the length of muscle in the front end and results in freer action.