It's not what people meant. They're wondering why this is a DD. It's just a plush, there's nothing impressive about it, deserving to be put there. I, for one, don't even see how it's a pony to begin with, and would have never guessed it was unless someone had told me. I think there could have been other cute details, such as hooves, or even goddamn nostrils. There could have been more hair as well.
See, this piece is in no way perfect, and that's okay, since there is no such thing as a perfect piece. However, I still fail to see why it deserves a DD. I just don't see what's special about it, other than 'ITZ A PONI!!!1111!'