Not breed to optimize for certain traits. But that's what dogs (and the current 'breeds') are all about anyway, both pugs and what most people consider 'anatomically correct' dogs.
Or at least don't optimize for traits that are disconnected from the health and wellbeing of the dog, like pure looks? Optimizing on more practical or athletic aspects probably makes it more difficult to end up with a sick dog.
Dogsled racing is a working area that has seen trend away from pure huskies. There are still plenty of huskies in the sport, but mixed teams are very common in the Iditarod now. In 2000 there were only three all-husky teams in the whole race. The racers are crossing with other breeds and bringing in new dogs that are more optimized for the race. There's a danger that in the long run they could end up with something extreme, like what greyhounds are for racing, but right now it's full of healthy, diverse dogs.