The diplomatic thing for me to say is that if publishers are dressing up other authors as Terry Pratchett clones then they are doing a disservice to those authors. If they didn't dress them as clones but did something different, then those authors could be pioneering in a different sense.
Terry PratchettParticles of raw inspiration sleet through the universe all the time. Every once in a while one of them hits a receptive mind, which then invents DNA or the flute sonata form or a way of making light bulbs wear out in half the time. But most of them miss. Most people go through their lives without being hit by even one.
Terry PratchettDogs are not like cats, who amusingly tolerate humans only until someone comes up with a tin opener that can be operated with a paw. Men made dogs, they took wolves and gave them human things - unnecessary intelligence, names, a desire to belong, and a twitching inferiority complex. All dogs dream wolf dreams, and know they're dreaming of biting their Maker. Every dog knows, deep in his heart, that he is a Bad Dog.
Terry Pratchett