I don't know, even if you have the perfect Yorkie, there's something somewhat "unfair" about cloning them. It just seems like the memory of the first Yorkie would be tainted somehow, and that you'd constantly be comparing them to the original.
I see it as going to a new restaurant for the very first time, ordering a meal, loving it, and then only ordering the exact same meal every time you go back to the same restaurant. There's nothing wrong with that, but there's a whole world out there of different experiences, and sometimes you have to mix things up in order to be pleasantly surprised.
But that's just me.