Of course you and Piper are welcome here! She is such a cutie.
My problem with mixed breeds is the same as many other people have already mentioned: they are being marketed as "designer" to turn a hefty profit, usually for BYB and millers. I personally don't know of any reputable breeders creating Morkies or Shorkies or Chorkies or Maltipoos...and the list goes on.
I personally love all dogs - purebred or mutt. My brother has a mutt from the pound and he is about 25 pounds of pure sweetness. What I cannot stand is greedy breeders selling "mutts" for thousands of dollars when there are millions of dogs in rescues and shelters, many of whom will be put to sleep before they find a home.