I've had the breed for more than 20 years and haven't had a problem with the dew-claws getting torn on my dogs. We have a lot of brush in the areas that I hike and horseback ride with the dogs and never had a problem. We never had a problem or heard of a problem doing ring sport (palisade, etc.) either.
I've heard of very few situations of torn or bleeding hind-dews, and it's usually the nail bed and not serious. However, just yesterday, the co-owner of one of my females mentioned that the dog broke the toe of one of the hind-dews she thinks. It's swollen. She figured it was injured in the yard playing with the other dogs that morning, but doesn't know. Not bothering her much though as she showed her yesterday to a Best in Show win at a local UKC show so didn't affect her movement or attitude.
The removal isn't as simple as snipping the flimsy hind-dew that occasionally is found on a GSD, Rottie, or Mal pup. It is bone connected to bone so removal would have to be done by a vet imo.
The double-dews are part of the breeds history and I don't see the standard changing to allow for dogs misising dews or their removal. They are a breed characteristic that is considered a sign of the race and purity.
That said, if I could wave a magic wand, the dews would not be held in such regard and I'd love it also if all my Beaucerons were born with upright ears like a Malinois and didn't have to undergo ear cropping for the look that I and many others prefer.
When considering getting a Beauceron for work, the possibility of the dew-claws getting torn would not be a concern for me. You will get a lot of remarks from the public regarding the dews. Quite the conversation piece as people ask about them.