I have been wanting to comment further on this topic but I just reread the original question and it focused my thoughts: conformation discrepancies between our show standard and what lends itself to a great hunting dog. There are a bunch.
One – an obvious one is coat. Show coats are ridiculous for both the quantity and texture. A soft, fuzzy, wooly coat texture grows a whole lot more coat than straight and can then be shaped and scissored and fluffed to cover or enhance certain structures. Blow dryers, mousse and flat irons make those fluffy coats look straight and smooth for the judge but those coats are a nightmare for a hunter.
Another – shoulders. Go watch a bunch of dogs run/hunt, including trial dogs. And after you watch them run, pet them and feel their shoulders, and reflect on how you thought that dog moved. You will feel differences that you cannot easily see and that is the best way I know to learn what good shoulders are for a working dog. It’s not the same as for show dogs that don’t have to run.
As far as movement: the standard only discusses trotting, which is not the gait most used by hunting dogs (the gallop is.) And in the show ring, movement is limited to trotting (slow or fast, depending on ring size) and the dog is moved in a very controlled manner, mostly with the lead strung up pretty tight. A far cry from movement necessary and efficient in the field.