A lot of the whole point of NAVHDA, as you can read from Ithaca's post, is to promote good breeding among the various versatile breeds. They push testing pups for natural ability as well as trained dogs. They also look for effective hunting dogs as opposed to wide-running field trial dogs. My next dog will probably end up being a Brittany spaniel, as they are usually a "softer" dog, temperamentally, and a little smaller than most other versatile breeds. They do have longer hair which can shed.
By effective hunting dogs, I mean dogs that really want to please you, and are cooperative hunters rather than solo atheletes like field trialers. You want a dog that will check back in once in while, range out far enough but not too far, change directions when you do, etc. I think that a "NAVHDA bred" pup has the best chance of doing that, especially if it is repeat breeding of a successful previous match between sire and dam.