A dog with a long soft, coat would probalby not survive during a Germany winter without human intervention. Long soft coats soak up water and then freeze which can add up to 40 lbs to the total weight of the animal.  They will form ice balls and expose the skin to frost bite. Ice balls will form between the pads rendering the dog useless. A dog with a long, soft coat can freeze fast to the ground during the night and tear out a substantial portion of it's coat when he tries to rise in the morning.  In the summer these coats will collect dirt and burrs that will results in skin irritations and infections. If the plan is to preserve the GSD as a tending dog, then allowing dogs with long, soft coats to be eligible for breed surveys is self-defeating.

Unless your longocat is tending 24/7 during a German winter sleeping outside and not being groomed and trimmed, you are not comparing apples to apples by saying that you have a dog with a long coat that is weather resistant. Either your dog has a long, harsh coat with ample undercoat that repels the water or it is not challenged with tending 24/7 sleeping out of doors in all weather and never groomed to remove burrs and mats. Shepherds did not carry tack boxes or portable shelters for their dogs. They had to survive all on their own. A long coat is weather resistant only if the guardhairs are coarse and water resistant. Soft coats soak up water like sponges. I can only hope that if the SV does allow long hairs that they will require coarse, harsh guardhairs with an undercoat of adequate length and quality to protect the dog in all weather.