Ftr, I had to hold my Champagne doe for the first 2 breedings. Now she lifts like a champ. It just took her a bit to figure out what was what, I guess.
Your only major disadvantage would be in showing, if you had a judge who is unfamiliar or inexperienced with the mandolin shape. I've been raising Americans and champagne d'argents side by side for several litters now and can honestly say I prefer the champs. The American loin IS longer but...